/usr/bin/java -Xmx16000000000 -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-Separate.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-dev-bc79526 [2022-01-18 15:21:10,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:21:10,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:21:10,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:21:10,976 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-Separate.epf [2022-01-18 15:21:10,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:21:10,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:21:10,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:21:10,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:21:10,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:21:10,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:21:10,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:21:10,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:21:10,995 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:21:10,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:21:10,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:21:10,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:21:10,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:21:10,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:21:10,997 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:21:10,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:21:11,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:21:11,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:21:11,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:21:11,180 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:21:11,181 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:21:11,182 INFO L432 ainManager$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 [2022-01-18 15:21:11,182 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2022-01-18 15:21:11,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:21:11,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:21:11,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:21:11,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:21:11,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:21:11,235 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,242 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,254 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:21:11,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:21:11,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:21:11,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:21:11,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:21:11,262 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,262 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,263 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,263 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,266 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,268 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,268 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 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:21:11,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:21:11,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:21:11,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:21:11,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:21:11" (1/1) ... [2022-01-18 15:21:11,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:21:11,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:11,329 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) [2022-01-18 15:21:11,366 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 [2022-01-18 15:21:11,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:21:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:21:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:21:11,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:21:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:21:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:21:11,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:21:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:21:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:21:11,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:21:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:21:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:21:11,381 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:21:11,422 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:21:11,424 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:21:11,602 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:21:11,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:21:11,685 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 15:21:11,692 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:21:11 BoogieIcfgContainer [2022-01-18 15:21:11,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:21:11,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:21:11,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:21:11,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:21:11,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:21:11" (1/2) ... [2022-01-18 15:21:11,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c7a139 and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:21:11, skipping insertion in model container [2022-01-18 15:21:11,696 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 18.01 03:21:11" (2/2) ... [2022-01-18 15:21:11,696 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2022-01-18 15:21:11,699 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:21:11,699 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:21:11,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:21:11,699 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:21:11,754 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 15:21:11,783 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:21:11,796 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 [2022-01-18 15:21:11,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 15:21:11,802 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2022-01-18 15:21:11,825 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) [2022-01-18 15:21:11,827 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) [2022-01-18 15:21:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:21:11,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:11,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:11,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash -29429742, now seen corresponding path program 1 times [2022-01-18 15:21:11,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:11,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592028604] [2022-01-18 15:21:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:11,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:12,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592028604] [2022-01-18 15:21:12,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592028604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:12,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:12,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:12,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237516239] [2022-01-18 15:21:12,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:12,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:12,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:12,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:12,100 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) [2022-01-18 15:21:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:12,372 INFO L93 Difference]: Finished difference Result 277 states and 874 transitions. [2022-01-18 15:21:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:12,373 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 [2022-01-18 15:21:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:12,390 INFO L225 Difference]: With dead ends: 277 [2022-01-18 15:21:12,390 INFO L226 Difference]: Without dead ends: 262 [2022-01-18 15:21:12,393 INFO L932 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 [2022-01-18 15:21:12,397 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:12,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-18 15:21:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 126. [2022-01-18 15:21:12,432 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) [2022-01-18 15:21:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2022-01-18 15:21:12,433 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2022-01-18 15:21:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:12,434 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2022-01-18 15:21:12,434 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) [2022-01-18 15:21:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2022-01-18 15:21:12,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:21:12,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:12,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:12,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:21:12,436 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1669447950, now seen corresponding path program 2 times [2022-01-18 15:21:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:12,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464158599] [2022-01-18 15:21:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:12,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:12,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464158599] [2022-01-18 15:21:12,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464158599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:12,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:12,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:12,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779353051] [2022-01-18 15:21:12,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:12,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:12,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:12,534 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) [2022-01-18 15:21:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:12,686 INFO L93 Difference]: Finished difference Result 257 states and 779 transitions. [2022-01-18 15:21:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:12,687 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 [2022-01-18 15:21:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:12,689 INFO L225 Difference]: With dead ends: 257 [2022-01-18 15:21:12,689 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 15:21:12,689 INFO L932 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 [2022-01-18 15:21:12,690 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:12,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 15:21:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 132. [2022-01-18 15:21:12,698 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) [2022-01-18 15:21:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2022-01-18 15:21:12,699 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2022-01-18 15:21:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:12,699 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2022-01-18 15:21:12,699 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) [2022-01-18 15:21:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2022-01-18 15:21:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:21:12,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:12,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:12,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:21:12,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash 332003462, now seen corresponding path program 3 times [2022-01-18 15:21:12,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:12,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244600286] [2022-01-18 15:21:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:12,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244600286] [2022-01-18 15:21:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244600286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:12,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:12,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:12,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801607826] [2022-01-18 15:21:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:12,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:12,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:12,836 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) [2022-01-18 15:21:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:12,987 INFO L93 Difference]: Finished difference Result 411 states and 1319 transitions. [2022-01-18 15:21:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:21:12,988 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 [2022-01-18 15:21:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:12,990 INFO L225 Difference]: With dead ends: 411 [2022-01-18 15:21:12,990 INFO L226 Difference]: Without dead ends: 396 [2022-01-18 15:21:12,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:21:12,991 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:12,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 35 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-18 15:21:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 140. [2022-01-18 15:21:12,999 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) [2022-01-18 15:21:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-01-18 15:21:13,000 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-01-18 15:21:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:13,000 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-01-18 15:21:13,000 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) [2022-01-18 15:21:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-01-18 15:21:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:21:13,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:13,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:13,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:21:13,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -198832182, now seen corresponding path program 4 times [2022-01-18 15:21:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38261869] [2022-01-18 15:21:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:13,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:13,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:13,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38261869] [2022-01-18 15:21:13,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38261869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:13,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:13,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:13,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821646429] [2022-01-18 15:21:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:13,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:13,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:13,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:13,098 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) [2022-01-18 15:21:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:13,264 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2022-01-18 15:21:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:13,264 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 [2022-01-18 15:21:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:13,265 INFO L225 Difference]: With dead ends: 264 [2022-01-18 15:21:13,266 INFO L226 Difference]: Without dead ends: 249 [2022-01-18 15:21:13,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:21:13,267 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:13,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 30 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-18 15:21:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2022-01-18 15:21:13,272 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) [2022-01-18 15:21:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-01-18 15:21:13,273 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-01-18 15:21:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:13,273 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-01-18 15:21:13,273 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) [2022-01-18 15:21:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-01-18 15:21:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:21:13,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:13,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:13,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:21:13,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1457604362, now seen corresponding path program 5 times [2022-01-18 15:21:13,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:13,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800504038] [2022-01-18 15:21:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:13,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:13,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:13,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800504038] [2022-01-18 15:21:13,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800504038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:13,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:13,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:13,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213906241] [2022-01-18 15:21:13,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:13,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:13,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:13,373 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) [2022-01-18 15:21:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:13,564 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2022-01-18 15:21:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:13,565 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 [2022-01-18 15:21:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:13,566 INFO L225 Difference]: With dead ends: 229 [2022-01-18 15:21:13,566 INFO L226 Difference]: Without dead ends: 214 [2022-01-18 15:21:13,566 INFO L932 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 [2022-01-18 15:21:13,567 INFO L933 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 [2022-01-18 15:21:13,567 INFO L934 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] [2022-01-18 15:21:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-18 15:21:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2022-01-18 15:21:13,574 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) [2022-01-18 15:21:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-01-18 15:21:13,574 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-01-18 15:21:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:13,575 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-01-18 15:21:13,575 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) [2022-01-18 15:21:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-01-18 15:21:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:21:13,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:13,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:13,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 15:21:13,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1842890102, now seen corresponding path program 6 times [2022-01-18 15:21:13,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842711933] [2022-01-18 15:21:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:13,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:13,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842711933] [2022-01-18 15:21:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842711933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:13,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:13,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:13,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316349471] [2022-01-18 15:21:13,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:13,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:13,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:13,699 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) [2022-01-18 15:21:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:13,942 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2022-01-18 15:21:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:21:13,943 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 [2022-01-18 15:21:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:13,944 INFO L225 Difference]: With dead ends: 336 [2022-01-18 15:21:13,944 INFO L226 Difference]: Without dead ends: 321 [2022-01-18 15:21:13,945 INFO L932 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 [2022-01-18 15:21:13,945 INFO L933 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:13,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-18 15:21:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2022-01-18 15:21:13,951 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) [2022-01-18 15:21:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-01-18 15:21:13,952 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-01-18 15:21:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:13,952 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-01-18 15:21:13,952 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) [2022-01-18 15:21:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-01-18 15:21:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:21:13,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:13,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:13,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 15:21:13,953 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1236732740, now seen corresponding path program 1 times [2022-01-18 15:21:13,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:13,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097446167] [2022-01-18 15:21:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:13,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:13,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:13,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097446167] [2022-01-18 15:21:13,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097446167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:13,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:13,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:21:13,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559289523] [2022-01-18 15:21:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:13,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:21:13,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:21:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:21:13,970 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) [2022-01-18 15:21:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:13,997 INFO L93 Difference]: Finished difference Result 163 states and 538 transitions. [2022-01-18 15:21:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:21:13,998 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 [2022-01-18 15:21:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:13,999 INFO L225 Difference]: With dead ends: 163 [2022-01-18 15:21:13,999 INFO L226 Difference]: Without dead ends: 163 [2022-01-18 15:21:13,999 INFO L932 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 [2022-01-18 15:21:14,001 INFO L933 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 [2022-01-18 15:21:14,002 INFO L934 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] [2022-01-18 15:21:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-18 15:21:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-01-18 15:21:14,006 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) [2022-01-18 15:21:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 538 transitions. [2022-01-18 15:21:14,007 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 538 transitions. Word has length 15 [2022-01-18 15:21:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,007 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 538 transitions. [2022-01-18 15:21:14,007 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) [2022-01-18 15:21:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 538 transitions. [2022-01-18 15:21:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:21:14,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 15:21:14,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810757, now seen corresponding path program 1 times [2022-01-18 15:21:14,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965960371] [2022-01-18 15:21:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965960371] [2022-01-18 15:21:14,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965960371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:14,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:14,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:21:14,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750478623] [2022-01-18 15:21:14,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:21:14,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:21:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:21:14,039 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) [2022-01-18 15:21:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:14,068 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2022-01-18 15:21:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:21:14,069 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 [2022-01-18 15:21:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:14,070 INFO L225 Difference]: With dead ends: 192 [2022-01-18 15:21:14,070 INFO L226 Difference]: Without dead ends: 192 [2022-01-18 15:21:14,070 INFO L932 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 [2022-01-18 15:21:14,071 INFO L933 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 [2022-01-18 15:21:14,071 INFO L934 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] [2022-01-18 15:21:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-18 15:21:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-18 15:21:14,077 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) [2022-01-18 15:21:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2022-01-18 15:21:14,078 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2022-01-18 15:21:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,078 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2022-01-18 15:21:14,079 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) [2022-01-18 15:21:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2022-01-18 15:21:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:21:14,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 15:21:14,080 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1075245774, now seen corresponding path program 1 times [2022-01-18 15:21:14,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131323145] [2022-01-18 15:21:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131323145] [2022-01-18 15:21:14,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131323145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:14,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:14,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:21:14,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027501151] [2022-01-18 15:21:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:21:14,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:21:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:21:14,114 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) [2022-01-18 15:21:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:14,138 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2022-01-18 15:21:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:21:14,138 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 [2022-01-18 15:21:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:14,140 INFO L225 Difference]: With dead ends: 223 [2022-01-18 15:21:14,140 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 15:21:14,140 INFO L932 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 [2022-01-18 15:21:14,141 INFO L933 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 [2022-01-18 15:21:14,142 INFO L934 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] [2022-01-18 15:21:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 15:21:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-01-18 15:21:14,146 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) [2022-01-18 15:21:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2022-01-18 15:21:14,147 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2022-01-18 15:21:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,147 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2022-01-18 15:21:14,147 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) [2022-01-18 15:21:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2022-01-18 15:21:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:14,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 15:21:14,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash -8420014, now seen corresponding path program 1 times [2022-01-18 15:21:14,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554055096] [2022-01-18 15:21:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:14,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554055096] [2022-01-18 15:21:14,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554055096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:14,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:14,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:14,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086865661] [2022-01-18 15:21:14,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:14,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:14,206 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) [2022-01-18 15:21:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:14,303 INFO L93 Difference]: Finished difference Result 571 states and 1745 transitions. [2022-01-18 15:21:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:21:14,303 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 [2022-01-18 15:21:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:14,305 INFO L225 Difference]: With dead ends: 571 [2022-01-18 15:21:14,305 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 15:21:14,306 INFO L932 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 [2022-01-18 15:21:14,306 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:14,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 15:21:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2022-01-18 15:21:14,313 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) [2022-01-18 15:21:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 758 transitions. [2022-01-18 15:21:14,314 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 758 transitions. Word has length 16 [2022-01-18 15:21:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,316 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 758 transitions. [2022-01-18 15:21:14,316 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) [2022-01-18 15:21:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 758 transitions. [2022-01-18 15:21:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:14,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 15:21:14,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash 245083442, now seen corresponding path program 1 times [2022-01-18 15:21:14,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801242573] [2022-01-18 15:21:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:14,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801242573] [2022-01-18 15:21:14,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801242573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:14,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:14,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:14,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680516094] [2022-01-18 15:21:14,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:14,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:14,383 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) [2022-01-18 15:21:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:14,448 INFO L93 Difference]: Finished difference Result 403 states and 1190 transitions. [2022-01-18 15:21:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:14,448 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 [2022-01-18 15:21:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:14,450 INFO L225 Difference]: With dead ends: 403 [2022-01-18 15:21:14,450 INFO L226 Difference]: Without dead ends: 355 [2022-01-18 15:21:14,450 INFO L932 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 [2022-01-18 15:21:14,451 INFO L933 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:14,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-18 15:21:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 233. [2022-01-18 15:21:14,457 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) [2022-01-18 15:21:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2022-01-18 15:21:14,458 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2022-01-18 15:21:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,458 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2022-01-18 15:21:14,458 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) [2022-01-18 15:21:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2022-01-18 15:21:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:14,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 15:21:14,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1080130578, now seen corresponding path program 2 times [2022-01-18 15:21:14,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359675130] [2022-01-18 15:21:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:14,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359675130] [2022-01-18 15:21:14,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359675130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:14,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:14,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:21:14,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509247840] [2022-01-18 15:21:14,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:21:14,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:21:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:21:14,496 INFO L87 Difference]: Start difference. First operand 233 states and 753 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) [2022-01-18 15:21:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:14,543 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2022-01-18 15:21:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:21:14,543 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 [2022-01-18 15:21:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:14,544 INFO L225 Difference]: With dead ends: 347 [2022-01-18 15:21:14,544 INFO L226 Difference]: Without dead ends: 283 [2022-01-18 15:21:14,545 INFO L932 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 [2022-01-18 15:21:14,545 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:14,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:21:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-18 15:21:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-01-18 15:21:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2022-01-18 15:21:14,552 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2022-01-18 15:21:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,552 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2022-01-18 15:21:14,552 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) [2022-01-18 15:21:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2022-01-18 15:21:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:14,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 15:21:14,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 94528582, now seen corresponding path program 1 times [2022-01-18 15:21:14,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618618820] [2022-01-18 15:21:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618618820] [2022-01-18 15:21:14,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618618820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:14,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052342412] [2022-01-18 15:21:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:14,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:14,596 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) [2022-01-18 15:21:14,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:21:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 15:21:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052342412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:14,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:14,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-01-18 15:21:14,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631858613] [2022-01-18 15:21:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:21:14,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:21:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:21:14,927 INFO L87 Difference]: Start difference. First operand 230 states and 747 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) [2022-01-18 15:21:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:15,046 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2022-01-18 15:21:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:21:15,046 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 [2022-01-18 15:21:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:15,048 INFO L225 Difference]: With dead ends: 529 [2022-01-18 15:21:15,048 INFO L226 Difference]: Without dead ends: 455 [2022-01-18 15:21:15,048 INFO L932 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 [2022-01-18 15:21:15,049 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:15,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 45 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-18 15:21:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2022-01-18 15:21:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2022-01-18 15:21:15,056 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2022-01-18 15:21:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:15,056 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2022-01-18 15:21:15,056 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) [2022-01-18 15:21:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2022-01-18 15:21:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:15,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:15,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:15,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:15,273 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 [2022-01-18 15:21:15,274 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash -757483642, now seen corresponding path program 2 times [2022-01-18 15:21:15,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:15,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621671672] [2022-01-18 15:21:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:15,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621671672] [2022-01-18 15:21:15,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621671672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:15,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:15,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:21:15,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694359830] [2022-01-18 15:21:15,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:15,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:21:15,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:21:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:21:15,301 INFO L87 Difference]: Start difference. First operand 240 states and 750 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) [2022-01-18 15:21:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:15,337 INFO L93 Difference]: Finished difference Result 343 states and 1000 transitions. [2022-01-18 15:21:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:21:15,337 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 [2022-01-18 15:21:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:15,339 INFO L225 Difference]: With dead ends: 343 [2022-01-18 15:21:15,339 INFO L226 Difference]: Without dead ends: 273 [2022-01-18 15:21:15,339 INFO L932 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 [2022-01-18 15:21:15,340 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:15,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:21:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-18 15:21:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 242. [2022-01-18 15:21:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.087136929460581) internal successors, (744), 241 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 744 transitions. [2022-01-18 15:21:15,345 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 744 transitions. Word has length 16 [2022-01-18 15:21:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:15,345 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 744 transitions. [2022-01-18 15:21:15,345 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) [2022-01-18 15:21:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 744 transitions. [2022-01-18 15:21:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:15,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:15,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:15,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 15:21:15,346 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -472042042, now seen corresponding path program 2 times [2022-01-18 15:21:15,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596340059] [2022-01-18 15:21:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:15,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:15,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596340059] [2022-01-18 15:21:15,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596340059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:15,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:15,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:15,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844646776] [2022-01-18 15:21:15,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:15,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:15,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:15,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:15,376 INFO L87 Difference]: Start difference. First operand 242 states and 744 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) [2022-01-18 15:21:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:15,428 INFO L93 Difference]: Finished difference Result 310 states and 888 transitions. [2022-01-18 15:21:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:15,429 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 [2022-01-18 15:21:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:15,430 INFO L225 Difference]: With dead ends: 310 [2022-01-18 15:21:15,430 INFO L226 Difference]: Without dead ends: 269 [2022-01-18 15:21:15,431 INFO L932 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 [2022-01-18 15:21:15,432 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:15,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:21:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-18 15:21:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 238. [2022-01-18 15:21:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.1054852320675104) internal successors, (736), 237 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 736 transitions. [2022-01-18 15:21:15,437 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 736 transitions. Word has length 16 [2022-01-18 15:21:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:15,437 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 736 transitions. [2022-01-18 15:21:15,437 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) [2022-01-18 15:21:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 736 transitions. [2022-01-18 15:21:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:15,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:15,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:15,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 15:21:15,438 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1203369498, now seen corresponding path program 3 times [2022-01-18 15:21:15,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:15,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742551373] [2022-01-18 15:21:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:15,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742551373] [2022-01-18 15:21:15,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742551373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:15,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:15,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:21:15,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044903709] [2022-01-18 15:21:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:15,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:21:15,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:21:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:21:15,468 INFO L87 Difference]: Start difference. First operand 238 states and 736 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) [2022-01-18 15:21:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:15,501 INFO L93 Difference]: Finished difference Result 281 states and 840 transitions. [2022-01-18 15:21:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:21:15,501 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 [2022-01-18 15:21:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:15,502 INFO L225 Difference]: With dead ends: 281 [2022-01-18 15:21:15,502 INFO L226 Difference]: Without dead ends: 209 [2022-01-18 15:21:15,502 INFO L932 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 [2022-01-18 15:21:15,503 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:15,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 14 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:21:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-18 15:21:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-18 15:21:15,506 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) [2022-01-18 15:21:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2022-01-18 15:21:15,507 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2022-01-18 15:21:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:15,507 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2022-01-18 15:21:15,507 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) [2022-01-18 15:21:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2022-01-18 15:21:15,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:21:15,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:15,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:15,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-18 15:21:15,509 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 402212618, now seen corresponding path program 3 times [2022-01-18 15:21:15,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:15,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711072439] [2022-01-18 15:21:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:15,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711072439] [2022-01-18 15:21:15,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711072439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:21:15,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:21:15,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:21:15,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526899241] [2022-01-18 15:21:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:21:15,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:21:15,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:21:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:21:15,542 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) [2022-01-18 15:21:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:15,588 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2022-01-18 15:21:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:21:15,588 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 [2022-01-18 15:21:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:15,590 INFO L225 Difference]: With dead ends: 238 [2022-01-18 15:21:15,590 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 15:21:15,590 INFO L932 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 [2022-01-18 15:21:15,591 INFO L933 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 [2022-01-18 15:21:15,591 INFO L934 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] [2022-01-18 15:21:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 15:21:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-01-18 15:21:15,594 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) [2022-01-18 15:21:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-18 15:21:15,595 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2022-01-18 15:21:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:15,595 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-18 15:21:15,595 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) [2022-01-18 15:21:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-18 15:21:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:15,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:15,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:15,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-18 15:21:15,596 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1843106918, now seen corresponding path program 1 times [2022-01-18 15:21:15,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187348130] [2022-01-18 15:21:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:15,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187348130] [2022-01-18 15:21:15,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187348130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647230296] [2022-01-18 15:21:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:15,792 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) [2022-01-18 15:21:15,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:21:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 15:21:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:16,336 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 85 treesize of output 69 [2022-01-18 15:21:16,645 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 168 treesize of output 146 [2022-01-18 15:21:16,649 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 150 treesize of output 132 [2022-01-18 15:21:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:16,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:17,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:18,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:18,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 285 [2022-01-18 15:21:18,122 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 279 treesize of output 241 [2022-01-18 15:21:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:18,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647230296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:18,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:18,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2022-01-18 15:21:18,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75261954] [2022-01-18 15:21:18,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:18,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:21:18,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:21:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:21:18,380 INFO L87 Difference]: Start difference. First operand 189 states and 549 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) [2022-01-18 15:21:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:27,306 INFO L93 Difference]: Finished difference Result 1601 states and 4410 transitions. [2022-01-18 15:21:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:21:27,307 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 [2022-01-18 15:21:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:27,312 INFO L225 Difference]: With dead ends: 1601 [2022-01-18 15:21:27,312 INFO L226 Difference]: Without dead ends: 1265 [2022-01-18 15:21:27,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1903, Invalid=6653, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 15:21:27,313 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 465 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:27,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 558 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:21:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-01-18 15:21:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 356. [2022-01-18 15:21:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.101408450704225) internal successors, (1101), 355 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1101 transitions. [2022-01-18 15:21:27,326 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1101 transitions. Word has length 20 [2022-01-18 15:21:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:27,326 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1101 transitions. [2022-01-18 15:21:27,326 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) [2022-01-18 15:21:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1101 transitions. [2022-01-18 15:21:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:27,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:27,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:27,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:27,549 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,SelfDestructingSolverStorable17 [2022-01-18 15:21:27,550 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1724935778, now seen corresponding path program 2 times [2022-01-18 15:21:27,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:27,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542417504] [2022-01-18 15:21:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:27,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:27,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542417504] [2022-01-18 15:21:27,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542417504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966198272] [2022-01-18 15:21:27,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:27,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:27,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:27,679 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) [2022-01-18 15:21:27,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:21:27,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:27,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:21:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:27,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:27,984 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 214 treesize of output 182 [2022-01-18 15:21:27,987 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 180 treesize of output 160 [2022-01-18 15:21:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:28,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:28,476 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 164 treesize of output 144 [2022-01-18 15:21:28,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:28,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:28,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:21:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:29,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966198272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:29,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:29,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:21:29,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624884275] [2022-01-18 15:21:29,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:29,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:29,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:29,144 INFO L87 Difference]: Start difference. First operand 356 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2022-01-18 15:21:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:30,208 INFO L93 Difference]: Finished difference Result 1024 states and 2998 transitions. [2022-01-18 15:21:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:21:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 20 [2022-01-18 15:21:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:30,212 INFO L225 Difference]: With dead ends: 1024 [2022-01-18 15:21:30,212 INFO L226 Difference]: Without dead ends: 851 [2022-01-18 15:21:30,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:21:30,212 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 227 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:30,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 228 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-01-18 15:21:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 405. [2022-01-18 15:21:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.1534653465346536) internal successors, (1274), 404 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1274 transitions. [2022-01-18 15:21:30,224 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1274 transitions. Word has length 20 [2022-01-18 15:21:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:30,224 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1274 transitions. [2022-01-18 15:21:30,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2022-01-18 15:21:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1274 transitions. [2022-01-18 15:21:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:30,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:30,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:30,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:30,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:30,444 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1025069888, now seen corresponding path program 3 times [2022-01-18 15:21:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:30,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082893523] [2022-01-18 15:21:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:30,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:30,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:30,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082893523] [2022-01-18 15:21:30,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082893523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:30,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883449085] [2022-01-18 15:21:30,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:30,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:30,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:30,585 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) [2022-01-18 15:21:30,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:21:30,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:21:30,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:21:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:30,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:30,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:21:30,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 161 treesize of output 139 [2022-01-18 15:21:30,905 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 137 treesize of output 121 [2022-01-18 15:21:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:31,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:31,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:31,956 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 317 treesize of output 277 [2022-01-18 15:21:31,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:31,964 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 310 treesize of output 276 [2022-01-18 15:21:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:32,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883449085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:32,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:32,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-18 15:21:32,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672808469] [2022-01-18 15:21:32,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:32,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:32,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:32,339 INFO L87 Difference]: Start difference. First operand 405 states and 1274 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-01-18 15:21:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:32,967 INFO L93 Difference]: Finished difference Result 823 states and 2471 transitions. [2022-01-18 15:21:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:21:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 20 [2022-01-18 15:21:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:32,972 INFO L225 Difference]: With dead ends: 823 [2022-01-18 15:21:32,972 INFO L226 Difference]: Without dead ends: 681 [2022-01-18 15:21:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:21:32,979 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:32,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 211 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-18 15:21:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 434. [2022-01-18 15:21:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.187066974595843) internal successors, (1380), 433 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1380 transitions. [2022-01-18 15:21:33,000 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1380 transitions. Word has length 20 [2022-01-18 15:21:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:33,000 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1380 transitions. [2022-01-18 15:21:33,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-01-18 15:21:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1380 transitions. [2022-01-18 15:21:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:33,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:33,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:33,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:33,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:33,216 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1109587362, now seen corresponding path program 4 times [2022-01-18 15:21:33,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353854557] [2022-01-18 15:21:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:33,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353854557] [2022-01-18 15:21:33,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353854557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913350951] [2022-01-18 15:21:33,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:33,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:33,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:33,331 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) [2022-01-18 15:21:33,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:21:33,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:33,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:21:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:33,513 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 260 treesize of output 226 [2022-01-18 15:21:33,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:33,728 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 167 treesize of output 145 [2022-01-18 15:21:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:34,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:34,150 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 164 treesize of output 144 [2022-01-18 15:21:34,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:34,597 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 278 treesize of output 248 [2022-01-18 15:21:34,614 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 231 treesize of output 199 [2022-01-18 15:21:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:35,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913350951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:35,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:35,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-01-18 15:21:35,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766014081] [2022-01-18 15:21:35,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:35,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:35,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:35,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:35,132 INFO L87 Difference]: Start difference. First operand 434 states and 1380 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) [2022-01-18 15:21:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:35,631 INFO L93 Difference]: Finished difference Result 796 states and 2402 transitions. [2022-01-18 15:21:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:21:35,632 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 20 [2022-01-18 15:21:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:35,635 INFO L225 Difference]: With dead ends: 796 [2022-01-18 15:21:35,635 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 15:21:35,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:21:35,636 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:35,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 157 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 15:21:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 463. [2022-01-18 15:21:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.2554112554112553) internal successors, (1504), 462 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1504 transitions. [2022-01-18 15:21:35,647 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1504 transitions. Word has length 20 [2022-01-18 15:21:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:35,647 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1504 transitions. [2022-01-18 15:21:35,647 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) [2022-01-18 15:21:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1504 transitions. [2022-01-18 15:21:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:35,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:35,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:35,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:35,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:35,865 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1573545142, now seen corresponding path program 5 times [2022-01-18 15:21:35,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948192951] [2022-01-18 15:21:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:35,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:36,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:36,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948192951] [2022-01-18 15:21:36,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948192951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:36,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562581072] [2022-01-18 15:21:36,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:36,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:36,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:36,078 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) [2022-01-18 15:21:36,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:21:36,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:21:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:36,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 268 [2022-01-18 15:21:36,461 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 153 treesize of output 131 [2022-01-18 15:21:36,476 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 129 treesize of output 113 [2022-01-18 15:21:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:36,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:36,972 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 258 treesize of output 226 [2022-01-18 15:21:37,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:37,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 263 [2022-01-18 15:21:37,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 208 [2022-01-18 15:21:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:37,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562581072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:37,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:37,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-01-18 15:21:37,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621883107] [2022-01-18 15:21:37,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:37,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:21:37,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:21:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:21:37,457 INFO L87 Difference]: Start difference. First operand 463 states and 1504 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) [2022-01-18 15:21:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:38,217 INFO L93 Difference]: Finished difference Result 798 states and 2519 transitions. [2022-01-18 15:21:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:21:38,226 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 20 [2022-01-18 15:21:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:38,229 INFO L225 Difference]: With dead ends: 798 [2022-01-18 15:21:38,229 INFO L226 Difference]: Without dead ends: 751 [2022-01-18 15:21:38,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:21:38,231 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:38,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 256 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-18 15:21:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 463. [2022-01-18 15:21:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.2554112554112553) internal successors, (1504), 462 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1504 transitions. [2022-01-18 15:21:38,269 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1504 transitions. Word has length 20 [2022-01-18 15:21:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:38,269 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1504 transitions. [2022-01-18 15:21:38,269 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) [2022-01-18 15:21:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1504 transitions. [2022-01-18 15:21:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:38,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:38,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:38,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:38,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:38,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 279619950, now seen corresponding path program 6 times [2022-01-18 15:21:38,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849366675] [2022-01-18 15:21:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:38,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:38,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:38,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849366675] [2022-01-18 15:21:38,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849366675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:38,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428873993] [2022-01-18 15:21:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:38,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:38,604 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) [2022-01-18 15:21:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:21:38,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:21:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:21:38,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:38,737 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 153 treesize of output 137 [2022-01-18 15:21:39,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:21:39,326 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 283 [2022-01-18 15:21:39,330 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 274 treesize of output 242 [2022-01-18 15:21:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:39,890 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 313 treesize of output 277 [2022-01-18 15:21:40,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:40,350 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 165 [2022-01-18 15:21:40,355 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 148 treesize of output 132 [2022-01-18 15:21:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:40,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428873993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:40,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:40,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:21:40,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509435920] [2022-01-18 15:21:40,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:40,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:40,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:40,760 INFO L87 Difference]: Start difference. First operand 463 states and 1504 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) [2022-01-18 15:21:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:42,115 INFO L93 Difference]: Finished difference Result 1364 states and 3906 transitions. [2022-01-18 15:21:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:21:42,115 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 20 [2022-01-18 15:21:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:42,118 INFO L225 Difference]: With dead ends: 1364 [2022-01-18 15:21:42,118 INFO L226 Difference]: Without dead ends: 902 [2022-01-18 15:21:42,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:21:42,119 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 202 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:42,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 351 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 894 Invalid, 0 Unknown, 335 Unchecked, 0.4s Time] [2022-01-18 15:21:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-18 15:21:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 519. [2022-01-18 15:21:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.2104247104247103) internal successors, (1663), 518 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1663 transitions. [2022-01-18 15:21:42,130 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1663 transitions. Word has length 20 [2022-01-18 15:21:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:42,130 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1663 transitions. [2022-01-18 15:21:42,131 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) [2022-01-18 15:21:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1663 transitions. [2022-01-18 15:21:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:42,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:42,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:42,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:42,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:42,352 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1851584084, now seen corresponding path program 7 times [2022-01-18 15:21:42,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:42,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118607365] [2022-01-18 15:21:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:42,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:42,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118607365] [2022-01-18 15:21:42,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118607365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619931440] [2022-01-18 15:21:42,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:42,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:42,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:42,489 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) [2022-01-18 15:21:42,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:21:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:21:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:42,649 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 226 treesize of output 198 [2022-01-18 15:21:43,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:21:43,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:21:43,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:43,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:43,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 178 [2022-01-18 15:21:43,823 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 282 treesize of output 254 [2022-01-18 15:21:43,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:43,832 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 223 [2022-01-18 15:21:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619931440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:44,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:44,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:21:44,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410526667] [2022-01-18 15:21:44,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:44,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:44,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:44,216 INFO L87 Difference]: Start difference. First operand 519 states and 1663 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) [2022-01-18 15:21:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:44,427 INFO L93 Difference]: Finished difference Result 765 states and 2403 transitions. [2022-01-18 15:21:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:21:44,428 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 20 [2022-01-18 15:21:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:44,430 INFO L225 Difference]: With dead ends: 765 [2022-01-18 15:21:44,430 INFO L226 Difference]: Without dead ends: 706 [2022-01-18 15:21:44,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:21:44,431 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:44,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 173 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 399 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2022-01-18 15:21:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-18 15:21:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 543. [2022-01-18 15:21:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 3.215867158671587) internal successors, (1743), 542 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1743 transitions. [2022-01-18 15:21:44,439 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1743 transitions. Word has length 20 [2022-01-18 15:21:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:44,439 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1743 transitions. [2022-01-18 15:21:44,439 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) [2022-01-18 15:21:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1743 transitions. [2022-01-18 15:21:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:44,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:44,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:44,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:44,640 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,SelfDestructingSolverStorable23 [2022-01-18 15:21:44,640 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1029232930, now seen corresponding path program 8 times [2022-01-18 15:21:44,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:44,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818933394] [2022-01-18 15:21:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:44,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:44,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818933394] [2022-01-18 15:21:44,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818933394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854465218] [2022-01-18 15:21:44,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:44,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:44,746 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) [2022-01-18 15:21:44,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:21:44,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:44,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:44,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:21:44,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:44,866 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 181 treesize of output 157 [2022-01-18 15:21:45,208 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 145 treesize of output 125 [2022-01-18 15:21:45,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:21:45,211 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 144 treesize of output 126 [2022-01-18 15:21:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:45,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:45,602 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 238 treesize of output 214 [2022-01-18 15:21:46,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:46,008 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 247 treesize of output 217 [2022-01-18 15:21:46,017 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 212 treesize of output 184 [2022-01-18 15:21:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:46,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854465218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:46,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:46,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-18 15:21:46,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391671057] [2022-01-18 15:21:46,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:46,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:46,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:46,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:46,272 INFO L87 Difference]: Start difference. First operand 543 states and 1743 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-01-18 15:21:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:47,164 INFO L93 Difference]: Finished difference Result 1160 states and 3490 transitions. [2022-01-18 15:21:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:21:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 20 [2022-01-18 15:21:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:47,167 INFO L225 Difference]: With dead ends: 1160 [2022-01-18 15:21:47,167 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 15:21:47,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:21:47,168 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:47,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 356 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 624 Invalid, 0 Unknown, 246 Unchecked, 0.3s Time] [2022-01-18 15:21:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 15:21:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 625. [2022-01-18 15:21:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.176282051282051) internal successors, (1982), 624 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1982 transitions. [2022-01-18 15:21:47,183 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1982 transitions. Word has length 20 [2022-01-18 15:21:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:47,183 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1982 transitions. [2022-01-18 15:21:47,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-01-18 15:21:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1982 transitions. [2022-01-18 15:21:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:47,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:47,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:47,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:47,399 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,SelfDestructingSolverStorable24 [2022-01-18 15:21:47,399 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash -429455834, now seen corresponding path program 9 times [2022-01-18 15:21:47,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73058964] [2022-01-18 15:21:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:47,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:47,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73058964] [2022-01-18 15:21:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73058964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133584441] [2022-01-18 15:21:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:47,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:47,462 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) [2022-01-18 15:21:47,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:21:47,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:21:47,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:47,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:21:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:47,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:47,792 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 184 treesize of output 158 [2022-01-18 15:21:47,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:47,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:48,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:48,249 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 164 treesize of output 144 [2022-01-18 15:21:48,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:48,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:21:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:48,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133584441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:48,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:48,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:21:48,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328148809] [2022-01-18 15:21:48,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:21:48,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:21:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:21:48,476 INFO L87 Difference]: Start difference. First operand 625 states and 1982 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) [2022-01-18 15:21:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:48,719 INFO L93 Difference]: Finished difference Result 1002 states and 3034 transitions. [2022-01-18 15:21:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:21:48,719 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 [2022-01-18 15:21:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:48,731 INFO L225 Difference]: With dead ends: 1002 [2022-01-18 15:21:48,731 INFO L226 Difference]: Without dead ends: 864 [2022-01-18 15:21:48,731 INFO L932 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 [2022-01-18 15:21:48,732 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:48,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 118 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-18 15:21:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 630. [2022-01-18 15:21:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.1748807631160574) internal successors, (1997), 629 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1997 transitions. [2022-01-18 15:21:48,769 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1997 transitions. Word has length 20 [2022-01-18 15:21:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:48,769 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1997 transitions. [2022-01-18 15:21:48,769 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) [2022-01-18 15:21:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1997 transitions. [2022-01-18 15:21:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:48,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:48,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:48,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:48,971 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,SelfDestructingSolverStorable25 [2022-01-18 15:21:48,971 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2074195750, now seen corresponding path program 10 times [2022-01-18 15:21:48,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078587855] [2022-01-18 15:21:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:48,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:49,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078587855] [2022-01-18 15:21:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078587855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959008030] [2022-01-18 15:21:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:49,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:49,058 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) [2022-01-18 15:21:49,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:21:49,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:21:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:49,277 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 172 treesize of output 146 [2022-01-18 15:21:49,571 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 164 treesize of output 144 [2022-01-18 15:21:49,573 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 161 treesize of output 139 [2022-01-18 15:21:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:49,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:50,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:50,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:21:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:50,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959008030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:50,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:50,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 21 [2022-01-18 15:21:50,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044726689] [2022-01-18 15:21:50,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:50,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:50,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:50,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:50,879 INFO L87 Difference]: Start difference. First operand 630 states and 1997 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2022-01-18 15:21:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:54,040 INFO L93 Difference]: Finished difference Result 1895 states and 5506 transitions. [2022-01-18 15:21:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:21:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 20 [2022-01-18 15:21:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:54,046 INFO L225 Difference]: With dead ends: 1895 [2022-01-18 15:21:54,046 INFO L226 Difference]: Without dead ends: 1634 [2022-01-18 15:21:54,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=662, Invalid=2760, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:21:54,048 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 327 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:54,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 492 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:21:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2022-01-18 15:21:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 639. [2022-01-18 15:21:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.1865203761755487) internal successors, (2033), 638 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2033 transitions. [2022-01-18 15:21:54,091 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2033 transitions. Word has length 20 [2022-01-18 15:21:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:54,099 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2033 transitions. [2022-01-18 15:21:54,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2022-01-18 15:21:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2033 transitions. [2022-01-18 15:21:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:54,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:54,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:54,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 15:21:54,315 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,SelfDestructingSolverStorable26 [2022-01-18 15:21:54,316 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -607204812, now seen corresponding path program 11 times [2022-01-18 15:21:54,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524822856] [2022-01-18 15:21:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:54,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524822856] [2022-01-18 15:21:54,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524822856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060038273] [2022-01-18 15:21:54,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:54,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:54,408 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) [2022-01-18 15:21:54,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:21:54,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:54,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:21:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:54,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:21:54,673 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 173 treesize of output 147 [2022-01-18 15:21:54,675 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 145 treesize of output 127 [2022-01-18 15:21:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:54,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:55,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 294 [2022-01-18 15:21:55,570 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:55,570 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 333 treesize of output 290 [2022-01-18 15:21:55,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:21:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:55,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060038273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:55,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:55,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:21:55,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183573413] [2022-01-18 15:21:55,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:55,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:55,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:55,731 INFO L87 Difference]: Start difference. First operand 639 states and 2033 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2022-01-18 15:21:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:57,048 INFO L93 Difference]: Finished difference Result 1669 states and 5034 transitions. [2022-01-18 15:21:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:21:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 [2022-01-18 15:21:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:57,053 INFO L225 Difference]: With dead ends: 1669 [2022-01-18 15:21:57,053 INFO L226 Difference]: Without dead ends: 1402 [2022-01-18 15:21:57,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:21:57,054 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 180 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:57,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 303 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:21:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-01-18 15:21:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 673. [2022-01-18 15:21:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.1651785714285716) internal successors, (2127), 672 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2127 transitions. [2022-01-18 15:21:57,065 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2127 transitions. Word has length 20 [2022-01-18 15:21:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:57,065 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2127 transitions. [2022-01-18 15:21:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2022-01-18 15:21:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2127 transitions. [2022-01-18 15:21:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:57,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:57,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:57,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:57,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 15:21:57,279 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash 557243584, now seen corresponding path program 12 times [2022-01-18 15:21:57,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:57,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628685633] [2022-01-18 15:21:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:57,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:21:57,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:57,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628685633] [2022-01-18 15:21:57,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628685633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:57,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479934369] [2022-01-18 15:21:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:57,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:57,392 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) [2022-01-18 15:21:57,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:21:57,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:21:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:57,755 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 197 [2022-01-18 15:21:58,021 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 88 treesize of output 76 [2022-01-18 15:21:58,023 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 80 treesize of output 66 [2022-01-18 15:21:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:58,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:58,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:58,561 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 190 treesize of output 176 [2022-01-18 15:21:59,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:59,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 312 [2022-01-18 15:21:59,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:59,218 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 308 treesize of output 274 [2022-01-18 15:21:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:59,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479934369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:59,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:59,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 23 [2022-01-18 15:21:59,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105592767] [2022-01-18 15:21:59,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:59,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:21:59,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:59,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:21:59,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:21:59,685 INFO L87 Difference]: Start difference. First operand 673 states and 2127 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) [2022-01-18 15:22:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:01,246 INFO L93 Difference]: Finished difference Result 1524 states and 4549 transitions. [2022-01-18 15:22:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:22:01,246 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 20 [2022-01-18 15:22:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:01,251 INFO L225 Difference]: With dead ends: 1524 [2022-01-18 15:22:01,251 INFO L226 Difference]: Without dead ends: 1412 [2022-01-18 15:22:01,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=602, Invalid=2154, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:22:01,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 250 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:22:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-18 15:22:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 677. [2022-01-18 15:22:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1701183431952664) internal successors, (2143), 676 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2143 transitions. [2022-01-18 15:22:01,268 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2143 transitions. Word has length 20 [2022-01-18 15:22:01,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:01,268 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2143 transitions. [2022-01-18 15:22:01,268 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) [2022-01-18 15:22:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2143 transitions. [2022-01-18 15:22:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:01,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:01,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:01,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:01,483 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,SelfDestructingSolverStorable28 [2022-01-18 15:22:01,483 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1016092436, now seen corresponding path program 13 times [2022-01-18 15:22:01,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050635753] [2022-01-18 15:22:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:01,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:01,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050635753] [2022-01-18 15:22:01,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050635753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502450281] [2022-01-18 15:22:01,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:01,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:01,644 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) [2022-01-18 15:22:01,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:22:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:01,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:22:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:01,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:02,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:22:02,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 350 treesize of output 292 [2022-01-18 15:22:02,281 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 279 treesize of output 251 [2022-01-18 15:22:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:03,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:03,299 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 211 treesize of output 191 [2022-01-18 15:22:03,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:03,805 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 305 [2022-01-18 15:22:03,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 248 [2022-01-18 15:22:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502450281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:04,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:04,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:04,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217200119] [2022-01-18 15:22:04,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:04,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:04,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:04,217 INFO L87 Difference]: Start difference. First operand 677 states and 2143 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2022-01-18 15:22:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:04,852 INFO L93 Difference]: Finished difference Result 1116 states and 3388 transitions. [2022-01-18 15:22:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:22:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 20 [2022-01-18 15:22:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:04,855 INFO L225 Difference]: With dead ends: 1116 [2022-01-18 15:22:04,855 INFO L226 Difference]: Without dead ends: 1030 [2022-01-18 15:22:04,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:04,855 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 165 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:04,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 131 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 394 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:22:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-18 15:22:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 715. [2022-01-18 15:22:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.2100840336134455) internal successors, (2292), 714 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2292 transitions. [2022-01-18 15:22:04,866 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2292 transitions. Word has length 20 [2022-01-18 15:22:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:04,866 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2292 transitions. [2022-01-18 15:22:04,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2022-01-18 15:22:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2292 transitions. [2022-01-18 15:22:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:04,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:04,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:04,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:05,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:05,083 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash -574805676, now seen corresponding path program 14 times [2022-01-18 15:22:05,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:05,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308373965] [2022-01-18 15:22:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:05,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:05,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:05,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308373965] [2022-01-18 15:22:05,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308373965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:05,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614375022] [2022-01-18 15:22:05,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:05,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:05,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:05,203 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) [2022-01-18 15:22:05,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:22:05,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:22:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:05,338 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 173 treesize of output 149 [2022-01-18 15:22:05,618 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 186 treesize of output 160 [2022-01-18 15:22:05,620 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 136 treesize of output 122 [2022-01-18 15:22:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:05,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:06,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 268 [2022-01-18 15:22:06,330 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 244 treesize of output 216 [2022-01-18 15:22:06,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:06,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 199 [2022-01-18 15:22:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:06,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614375022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:06,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:06,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:22:06,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495520185] [2022-01-18 15:22:06,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:06,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:06,692 INFO L87 Difference]: Start difference. First operand 715 states and 2292 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:22:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:08,074 INFO L93 Difference]: Finished difference Result 1444 states and 4314 transitions. [2022-01-18 15:22:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:22:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 [2022-01-18 15:22:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:08,077 INFO L225 Difference]: With dead ends: 1444 [2022-01-18 15:22:08,077 INFO L226 Difference]: Without dead ends: 1247 [2022-01-18 15:22:08,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1858, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:22:08,078 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 174 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:08,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 333 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:22:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-01-18 15:22:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 721. [2022-01-18 15:22:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.2055555555555557) internal successors, (2308), 720 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2308 transitions. [2022-01-18 15:22:08,090 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2308 transitions. Word has length 20 [2022-01-18 15:22:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:08,090 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2308 transitions. [2022-01-18 15:22:08,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:22:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2308 transitions. [2022-01-18 15:22:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:08,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:08,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:08,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:08,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:08,307 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash 991068458, now seen corresponding path program 15 times [2022-01-18 15:22:08,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:08,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175052749] [2022-01-18 15:22:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:08,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:08,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:08,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175052749] [2022-01-18 15:22:08,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175052749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:08,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648774235] [2022-01-18 15:22:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:08,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:08,419 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) [2022-01-18 15:22:08,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:22:08,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:08,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:22:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:08,590 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 181 treesize of output 163 [2022-01-18 15:22:08,802 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 216 treesize of output 186 [2022-01-18 15:22:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:22:08,805 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 214 treesize of output 190 [2022-01-18 15:22:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:09,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:09,342 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 240 treesize of output 212 [2022-01-18 15:22:09,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:09,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:09,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 175 [2022-01-18 15:22:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:09,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648774235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:09,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:09,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:22:09,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121396634] [2022-01-18 15:22:09,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:09,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:09,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:09,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:09,975 INFO L87 Difference]: Start difference. First operand 721 states and 2308 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:22:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:10,568 INFO L93 Difference]: Finished difference Result 1201 states and 3678 transitions. [2022-01-18 15:22:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:22:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 [2022-01-18 15:22:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:10,571 INFO L225 Difference]: With dead ends: 1201 [2022-01-18 15:22:10,571 INFO L226 Difference]: Without dead ends: 1060 [2022-01-18 15:22:10,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:22:10,572 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:10,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 182 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 529 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 15:22:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-01-18 15:22:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 758. [2022-01-18 15:22:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.282694848084544) internal successors, (2485), 757 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2485 transitions. [2022-01-18 15:22:10,583 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2485 transitions. Word has length 20 [2022-01-18 15:22:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:10,584 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2485 transitions. [2022-01-18 15:22:10,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:22:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2485 transitions. [2022-01-18 15:22:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:10,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:10,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:10,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:10,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:10,801 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash -698874446, now seen corresponding path program 16 times [2022-01-18 15:22:10,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:10,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124814948] [2022-01-18 15:22:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:10,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:10,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124814948] [2022-01-18 15:22:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124814948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647705874] [2022-01-18 15:22:10,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:10,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:10,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:10,973 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) [2022-01-18 15:22:10,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:22:11,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:22:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:11,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 251 [2022-01-18 15:22:11,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:22:11,535 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 204 [2022-01-18 15:22:11,540 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 202 treesize of output 182 [2022-01-18 15:22:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:11,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:12,029 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 204 treesize of output 184 [2022-01-18 15:22:12,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:12,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 199 [2022-01-18 15:22:12,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 149 [2022-01-18 15:22:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:12,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647705874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:12,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:12,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:22:12,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007497848] [2022-01-18 15:22:12,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:12,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:12,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:12,749 INFO L87 Difference]: Start difference. First operand 758 states and 2485 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) [2022-01-18 15:22:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:13,159 INFO L93 Difference]: Finished difference Result 1027 states and 3262 transitions. [2022-01-18 15:22:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:22:13,160 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 [2022-01-18 15:22:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:13,161 INFO L225 Difference]: With dead ends: 1027 [2022-01-18 15:22:13,161 INFO L226 Difference]: Without dead ends: 976 [2022-01-18 15:22:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:22:13,162 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:13,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 187 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 472 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-01-18 15:22:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-18 15:22:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 776. [2022-01-18 15:22:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.2761290322580647) internal successors, (2539), 775 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2539 transitions. [2022-01-18 15:22:13,173 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2539 transitions. Word has length 20 [2022-01-18 15:22:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:13,173 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2539 transitions. [2022-01-18 15:22:13,173 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) [2022-01-18 15:22:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2539 transitions. [2022-01-18 15:22:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:13,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:13,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:13,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 15:22:13,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:13,395 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1194289374, now seen corresponding path program 17 times [2022-01-18 15:22:13,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826308894] [2022-01-18 15:22:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:13,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826308894] [2022-01-18 15:22:13,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826308894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71883086] [2022-01-18 15:22:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:13,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:13,494 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) [2022-01-18 15:22:13,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:22:13,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 15:22:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:13,774 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 152 treesize of output 130 [2022-01-18 15:22:14,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:14,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 137 [2022-01-18 15:22:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:14,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:14,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:14,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 183 [2022-01-18 15:22:14,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:14,990 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2022-01-18 15:22:14,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:14,996 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 65 treesize of output 63 [2022-01-18 15:22:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:15,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71883086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:15,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:15,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 25 [2022-01-18 15:22:15,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611023788] [2022-01-18 15:22:15,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:15,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:22:15,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:22:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:22:15,107 INFO L87 Difference]: Start difference. First operand 776 states and 2539 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) [2022-01-18 15:22:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:18,078 INFO L93 Difference]: Finished difference Result 1455 states and 4476 transitions. [2022-01-18 15:22:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:22:18,078 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 20 [2022-01-18 15:22:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:18,081 INFO L225 Difference]: With dead ends: 1455 [2022-01-18 15:22:18,081 INFO L226 Difference]: Without dead ends: 1321 [2022-01-18 15:22:18,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=517, Invalid=3515, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:22:18,082 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 161 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:18,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 644 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:22:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-01-18 15:22:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 770. [2022-01-18 15:22:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.2873862158647595) internal successors, (2528), 769 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2528 transitions. [2022-01-18 15:22:18,094 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2528 transitions. Word has length 20 [2022-01-18 15:22:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:18,094 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2528 transitions. [2022-01-18 15:22:18,094 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) [2022-01-18 15:22:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2528 transitions. [2022-01-18 15:22:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:18,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:18,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:18,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 15:22:18,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:18,324 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -80284980, now seen corresponding path program 18 times [2022-01-18 15:22:18,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:18,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330729412] [2022-01-18 15:22:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:18,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:18,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:18,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330729412] [2022-01-18 15:22:18,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330729412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:18,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023293312] [2022-01-18 15:22:18,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:18,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:18,474 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) [2022-01-18 15:22:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:22:18,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:22:18,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:22:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:18,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:19,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:22:19,022 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 220 [2022-01-18 15:22:19,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:19,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:20,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:20,386 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 164 treesize of output 144 [2022-01-18 15:22:20,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:20,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 153 [2022-01-18 15:22:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:20,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023293312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:20,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:20,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:22:20,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484530613] [2022-01-18 15:22:20,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:20,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:20,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:20,868 INFO L87 Difference]: Start difference. First operand 770 states and 2528 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) [2022-01-18 15:22:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:22,116 INFO L93 Difference]: Finished difference Result 1412 states and 4258 transitions. [2022-01-18 15:22:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:22:22,116 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 20 [2022-01-18 15:22:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:22,118 INFO L225 Difference]: With dead ends: 1412 [2022-01-18 15:22:22,118 INFO L226 Difference]: Without dead ends: 1195 [2022-01-18 15:22:22,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:22:22,119 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:22,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 320 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 791 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-01-18 15:22:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-18 15:22:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 801. [2022-01-18 15:22:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.335) internal successors, (2668), 800 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2668 transitions. [2022-01-18 15:22:22,131 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2668 transitions. Word has length 20 [2022-01-18 15:22:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:22,132 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2668 transitions. [2022-01-18 15:22:22,132 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) [2022-01-18 15:22:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2668 transitions. [2022-01-18 15:22:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:22,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:22,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:22,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:22,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:22,339 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1737609016, now seen corresponding path program 19 times [2022-01-18 15:22:22,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:22,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918378191] [2022-01-18 15:22:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:22,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:22,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:22,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918378191] [2022-01-18 15:22:22,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918378191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:22,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809394413] [2022-01-18 15:22:22,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:22,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:22,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:22,474 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) [2022-01-18 15:22:22,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:22:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:22:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:22,602 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 145 treesize of output 125 [2022-01-18 15:22:22,905 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 290 treesize of output 242 [2022-01-18 15:22:22,909 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 235 treesize of output 205 [2022-01-18 15:22:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:23,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:23,467 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 328 treesize of output 288 [2022-01-18 15:22:23,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:23,958 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 267 treesize of output 245 [2022-01-18 15:22:23,968 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 228 treesize of output 204 [2022-01-18 15:22:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:24,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809394413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:24,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:24,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:22:24,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286433476] [2022-01-18 15:22:24,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:24,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:24,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:24,540 INFO L87 Difference]: Start difference. First operand 801 states and 2668 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:22:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:26,386 INFO L93 Difference]: Finished difference Result 1471 states and 4492 transitions. [2022-01-18 15:22:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:22:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 [2022-01-18 15:22:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:26,388 INFO L225 Difference]: With dead ends: 1471 [2022-01-18 15:22:26,389 INFO L226 Difference]: Without dead ends: 1269 [2022-01-18 15:22:26,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=483, Invalid=2487, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:22:26,389 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 175 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:26,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 479 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:22:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-01-18 15:22:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 830. [2022-01-18 15:22:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.3293124246079615) internal successors, (2760), 829 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2760 transitions. [2022-01-18 15:22:26,402 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2760 transitions. Word has length 20 [2022-01-18 15:22:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:26,402 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2760 transitions. [2022-01-18 15:22:26,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:22:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2760 transitions. [2022-01-18 15:22:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:26,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:26,403 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:26,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:26,603 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,SelfDestructingSolverStorable35 [2022-01-18 15:22:26,604 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash -456231440, now seen corresponding path program 20 times [2022-01-18 15:22:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757834252] [2022-01-18 15:22:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:26,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:26,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757834252] [2022-01-18 15:22:26,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757834252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904132972] [2022-01-18 15:22:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:26,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:26,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:26,688 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) [2022-01-18 15:22:26,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:22:26,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:26,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:22:26,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:26,742 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 17 treesize of output 13 [2022-01-18 15:22:26,876 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 32 treesize of output 24 [2022-01-18 15:22:26,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:26,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:27,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:27,402 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 3 treesize of output 1 [2022-01-18 15:22:27,407 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:27,408 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:22:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:27,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904132972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:27,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:27,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 15:22:27,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823012493] [2022-01-18 15:22:27,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:27,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:22:27,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:27,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:22:27,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:22:27,411 INFO L87 Difference]: Start difference. First operand 830 states and 2760 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2022-01-18 15:22:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:27,709 INFO L93 Difference]: Finished difference Result 1126 states and 3627 transitions. [2022-01-18 15:22:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:22:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 21 [2022-01-18 15:22:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:27,711 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 15:22:27,711 INFO L226 Difference]: Without dead ends: 1063 [2022-01-18 15:22:27,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:27,712 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:27,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 155 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-01-18 15:22:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 804. [2022-01-18 15:22:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.3412204234122043) internal successors, (2683), 803 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2683 transitions. [2022-01-18 15:22:27,723 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2683 transitions. Word has length 21 [2022-01-18 15:22:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:27,723 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2683 transitions. [2022-01-18 15:22:27,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2022-01-18 15:22:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2683 transitions. [2022-01-18 15:22:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:27,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:27,724 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:27,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:27,939 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,SelfDestructingSolverStorable36 [2022-01-18 15:22:27,940 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash 970559050, now seen corresponding path program 21 times [2022-01-18 15:22:27,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:27,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857311054] [2022-01-18 15:22:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:27,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:28,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:28,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857311054] [2022-01-18 15:22:28,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857311054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980496424] [2022-01-18 15:22:28,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:28,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:28,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:28,020 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) [2022-01-18 15:22:28,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:22:28,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:22:28,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:28,075 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 17 treesize of output 13 [2022-01-18 15:22:28,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:28,184 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 4 treesize of output 2 [2022-01-18 15:22:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:28,374 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 193 treesize of output 169 [2022-01-18 15:22:28,707 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 3 treesize of output 1 [2022-01-18 15:22:28,712 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:28,712 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 8 treesize of output 7 [2022-01-18 15:22:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:28,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980496424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:28,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:28,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:22:28,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455395836] [2022-01-18 15:22:28,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:28,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:22:28,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:22:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:22:28,716 INFO L87 Difference]: Start difference. First operand 804 states and 2683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-01-18 15:22:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:29,010 INFO L93 Difference]: Finished difference Result 1057 states and 3418 transitions. [2022-01-18 15:22:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:22:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 [2022-01-18 15:22:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:29,012 INFO L225 Difference]: With dead ends: 1057 [2022-01-18 15:22:29,013 INFO L226 Difference]: Without dead ends: 1002 [2022-01-18 15:22:29,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:29,013 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:29,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 145 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-01-18 15:22:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 806. [2022-01-18 15:22:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.3391304347826085) internal successors, (2688), 805 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2688 transitions. [2022-01-18 15:22:29,025 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2688 transitions. Word has length 21 [2022-01-18 15:22:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:29,025 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 2688 transitions. [2022-01-18 15:22:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-01-18 15:22:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2688 transitions. [2022-01-18 15:22:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:29,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:29,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:29,239 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,SelfDestructingSolverStorable37 [2022-01-18 15:22:29,240 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2146049694, now seen corresponding path program 22 times [2022-01-18 15:22:29,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:29,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534364134] [2022-01-18 15:22:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:29,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:29,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:29,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534364134] [2022-01-18 15:22:29,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534364134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:29,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127306395] [2022-01-18 15:22:29,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:29,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:29,361 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) [2022-01-18 15:22:29,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:22:29,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:29,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:22:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:29,418 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 17 treesize of output 13 [2022-01-18 15:22:29,560 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 219 treesize of output 185 [2022-01-18 15:22:29,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 165 [2022-01-18 15:22:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:29,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:29,918 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 193 treesize of output 169 [2022-01-18 15:22:30,209 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 3 treesize of output 1 [2022-01-18 15:22:30,215 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:30,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:30,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127306395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:30,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:30,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 15:22:30,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141530359] [2022-01-18 15:22:30,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:30,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:30,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:30,219 INFO L87 Difference]: Start difference. First operand 806 states and 2688 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) [2022-01-18 15:22:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:30,490 INFO L93 Difference]: Finished difference Result 1152 states and 3679 transitions. [2022-01-18 15:22:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:22:30,490 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 [2022-01-18 15:22:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:30,492 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 15:22:30,492 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 15:22:30,492 INFO L932 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 [2022-01-18 15:22:30,493 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 167 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:30,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 123 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 15:22:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 821. [2022-01-18 15:22:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.3670731707317074) internal successors, (2761), 820 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2761 transitions. [2022-01-18 15:22:30,504 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2761 transitions. Word has length 21 [2022-01-18 15:22:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:30,505 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 2761 transitions. [2022-01-18 15:22:30,505 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) [2022-01-18 15:22:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2761 transitions. [2022-01-18 15:22:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:30,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:30,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:30,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 15:22:30,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:30,721 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:30,722 INFO L85 PathProgramCache]: Analyzing trace with hash -601877648, now seen corresponding path program 23 times [2022-01-18 15:22:30,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:30,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466132942] [2022-01-18 15:22:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:30,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:30,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:30,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466132942] [2022-01-18 15:22:30,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466132942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:30,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335241344] [2022-01-18 15:22:30,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:30,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:30,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:30,865 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) [2022-01-18 15:22:30,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:22:30,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:22:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:30,923 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 17 treesize of output 13 [2022-01-18 15:22:31,121 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 289 treesize of output 239 [2022-01-18 15:22:31,124 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 239 treesize of output 209 [2022-01-18 15:22:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:31,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:31,487 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 193 treesize of output 169 [2022-01-18 15:22:31,849 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 3 treesize of output 1 [2022-01-18 15:22:31,854 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:31,854 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 8 treesize of output 7 [2022-01-18 15:22:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:31,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335241344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:31,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:31,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-01-18 15:22:31,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132991715] [2022-01-18 15:22:31,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:31,858 INFO L87 Difference]: Start difference. First operand 821 states and 2761 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) [2022-01-18 15:22:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:32,837 INFO L93 Difference]: Finished difference Result 1407 states and 4402 transitions. [2022-01-18 15:22:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:22:32,838 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 21 [2022-01-18 15:22:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:32,840 INFO L225 Difference]: With dead ends: 1407 [2022-01-18 15:22:32,840 INFO L226 Difference]: Without dead ends: 1293 [2022-01-18 15:22:32,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:22:32,841 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 162 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:32,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 224 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:22:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-18 15:22:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 790. [2022-01-18 15:22:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.3333333333333335) internal successors, (2630), 789 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2630 transitions. [2022-01-18 15:22:32,854 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2630 transitions. Word has length 21 [2022-01-18 15:22:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:32,855 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2630 transitions. [2022-01-18 15:22:32,855 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) [2022-01-18 15:22:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2630 transitions. [2022-01-18 15:22:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:32,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:32,856 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:32,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:33,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 15:22:33,072 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1601101796, now seen corresponding path program 24 times [2022-01-18 15:22:33,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824637844] [2022-01-18 15:22:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:33,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:33,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:33,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824637844] [2022-01-18 15:22:33,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824637844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:33,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317921435] [2022-01-18 15:22:33,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:33,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:33,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:33,150 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) [2022-01-18 15:22:33,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:22:33,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:33,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:33,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:33,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:33,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:33,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:33,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317921435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:33,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:33,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:22:33,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790393861] [2022-01-18 15:22:33,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:33,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:33,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:33,813 INFO L87 Difference]: Start difference. First operand 790 states and 2630 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-01-18 15:22:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:33,928 INFO L93 Difference]: Finished difference Result 1071 states and 3482 transitions. [2022-01-18 15:22:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:22:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 [2022-01-18 15:22:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:33,930 INFO L225 Difference]: With dead ends: 1071 [2022-01-18 15:22:33,930 INFO L226 Difference]: Without dead ends: 1013 [2022-01-18 15:22:33,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:33,930 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:33,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 71 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-18 15:22:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 867. [2022-01-18 15:22:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.3429561200923787) internal successors, (2895), 866 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2895 transitions. [2022-01-18 15:22:33,941 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2895 transitions. Word has length 21 [2022-01-18 15:22:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:33,942 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2895 transitions. [2022-01-18 15:22:33,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-01-18 15:22:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2895 transitions. [2022-01-18 15:22:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:33,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:33,943 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:33,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:34,158 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,SelfDestructingSolverStorable40 [2022-01-18 15:22:34,159 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1943351290, now seen corresponding path program 25 times [2022-01-18 15:22:34,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:34,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178877737] [2022-01-18 15:22:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:34,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:34,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178877737] [2022-01-18 15:22:34,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178877737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530633604] [2022-01-18 15:22:34,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:34,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:34,228 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) [2022-01-18 15:22:34,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:22:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:34,397 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 212 treesize of output 184 [2022-01-18 15:22:34,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 172 [2022-01-18 15:22:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:34,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:34,761 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 193 treesize of output 173 [2022-01-18 15:22:35,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:35,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530633604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:35,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:35,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:35,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521945531] [2022-01-18 15:22:35,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:35,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:35,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:35,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:35,088 INFO L87 Difference]: Start difference. First operand 867 states and 2895 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2022-01-18 15:22:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:35,270 INFO L93 Difference]: Finished difference Result 1189 states and 3851 transitions. [2022-01-18 15:22:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:35,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 [2022-01-18 15:22:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:35,272 INFO L225 Difference]: With dead ends: 1189 [2022-01-18 15:22:35,272 INFO L226 Difference]: Without dead ends: 1128 [2022-01-18 15:22:35,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:35,272 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:35,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 101 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-01-18 15:22:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 932. [2022-01-18 15:22:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.369495166487648) internal successors, (3137), 931 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3137 transitions. [2022-01-18 15:22:35,285 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3137 transitions. Word has length 21 [2022-01-18 15:22:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:35,285 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3137 transitions. [2022-01-18 15:22:35,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2022-01-18 15:22:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3137 transitions. [2022-01-18 15:22:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:35,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:35,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:35,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 15:22:35,500 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,SelfDestructingSolverStorable41 [2022-01-18 15:22:35,501 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash -677656424, now seen corresponding path program 26 times [2022-01-18 15:22:35,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:35,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617577504] [2022-01-18 15:22:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:35,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:35,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617577504] [2022-01-18 15:22:35,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617577504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447001617] [2022-01-18 15:22:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:35,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:35,570 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) [2022-01-18 15:22:35,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:22:35,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:35,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:35,740 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 171 treesize of output 145 [2022-01-18 15:22:35,743 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 145 treesize of output 127 [2022-01-18 15:22:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:35,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:36,091 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 193 treesize of output 173 [2022-01-18 15:22:36,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:36,324 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 20 treesize of output 24 [2022-01-18 15:22:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:36,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447001617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:36,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:36,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:36,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417370935] [2022-01-18 15:22:36,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:36,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:36,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:36,377 INFO L87 Difference]: Start difference. First operand 932 states and 3137 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-01-18 15:22:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:36,492 INFO L93 Difference]: Finished difference Result 1216 states and 3914 transitions. [2022-01-18 15:22:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:22:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 21 [2022-01-18 15:22:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:36,494 INFO L225 Difference]: With dead ends: 1216 [2022-01-18 15:22:36,494 INFO L226 Difference]: Without dead ends: 1164 [2022-01-18 15:22:36,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:36,494 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:36,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 76 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-01-18 15:22:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2022-01-18 15:22:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.363134657836645) internal successors, (3047), 906 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3047 transitions. [2022-01-18 15:22:36,506 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3047 transitions. Word has length 21 [2022-01-18 15:22:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:36,508 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 3047 transitions. [2022-01-18 15:22:36,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-01-18 15:22:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3047 transitions. [2022-01-18 15:22:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:36,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:36,509 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:36,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:36,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:36,724 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:36,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1741384932, now seen corresponding path program 27 times [2022-01-18 15:22:36,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:36,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802166884] [2022-01-18 15:22:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:36,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:36,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:36,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802166884] [2022-01-18 15:22:36,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802166884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:36,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637798266] [2022-01-18 15:22:36,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:36,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:36,774 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) [2022-01-18 15:22:36,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:22:36,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:36,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:37,086 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 20 treesize of output 16 [2022-01-18 15:22:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:37,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:37,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 269 [2022-01-18 15:22:37,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:37,429 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 276 treesize of output 246 [2022-01-18 15:22:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:37,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637798266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:37,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:37,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:37,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970942067] [2022-01-18 15:22:37,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:37,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:37,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:37,630 INFO L87 Difference]: Start difference. First operand 907 states and 3047 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-01-18 15:22:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:37,740 INFO L93 Difference]: Finished difference Result 1154 states and 3727 transitions. [2022-01-18 15:22:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:22:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 21 [2022-01-18 15:22:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:37,742 INFO L225 Difference]: With dead ends: 1154 [2022-01-18 15:22:37,742 INFO L226 Difference]: Without dead ends: 1082 [2022-01-18 15:22:37,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:37,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:37,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 98 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-01-18 15:22:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 959. [2022-01-18 15:22:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.3402922755741127) internal successors, (3200), 958 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3200 transitions. [2022-01-18 15:22:37,773 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3200 transitions. Word has length 21 [2022-01-18 15:22:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:37,773 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 3200 transitions. [2022-01-18 15:22:37,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-01-18 15:22:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3200 transitions. [2022-01-18 15:22:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:37,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:37,775 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:37,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:38,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:38,002 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2094524422, now seen corresponding path program 28 times [2022-01-18 15:22:38,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:38,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771137869] [2022-01-18 15:22:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:38,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:38,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771137869] [2022-01-18 15:22:38,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771137869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527954420] [2022-01-18 15:22:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:38,059 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) [2022-01-18 15:22:38,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:22:38,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:38,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:38,300 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 276 treesize of output 236 [2022-01-18 15:22:38,444 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 30 treesize of output 24 [2022-01-18 15:22:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:38,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:38,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 208 [2022-01-18 15:22:38,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:38,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 197 [2022-01-18 15:22:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:38,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527954420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:38,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:38,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:38,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787172420] [2022-01-18 15:22:38,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:38,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:38,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:38,962 INFO L87 Difference]: Start difference. First operand 959 states and 3200 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-01-18 15:22:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:39,190 INFO L93 Difference]: Finished difference Result 1373 states and 4390 transitions. [2022-01-18 15:22:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 21 [2022-01-18 15:22:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:39,193 INFO L225 Difference]: With dead ends: 1373 [2022-01-18 15:22:39,193 INFO L226 Difference]: Without dead ends: 1312 [2022-01-18 15:22:39,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:39,194 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 154 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:39,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 121 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-18 15:22:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 999. [2022-01-18 15:22:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.3927855711422845) internal successors, (3386), 998 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3386 transitions. [2022-01-18 15:22:39,211 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3386 transitions. Word has length 21 [2022-01-18 15:22:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:39,212 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 3386 transitions. [2022-01-18 15:22:39,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-01-18 15:22:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3386 transitions. [2022-01-18 15:22:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:39,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:39,213 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:39,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 15:22:39,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:39,426 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:39,426 INFO L85 PathProgramCache]: Analyzing trace with hash -526483292, now seen corresponding path program 29 times [2022-01-18 15:22:39,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:39,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296627924] [2022-01-18 15:22:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:39,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:39,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296627924] [2022-01-18 15:22:39,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296627924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773418953] [2022-01-18 15:22:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:39,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:39,489 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) [2022-01-18 15:22:39,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:22:39,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:39,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:39,646 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 225 treesize of output 199 [2022-01-18 15:22:39,805 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 37 treesize of output 29 [2022-01-18 15:22:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:40,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:40,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:22:40,055 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 [2022-01-18 15:22:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773418953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:40,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:40,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:40,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183988821] [2022-01-18 15:22:40,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:40,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:40,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:40,330 INFO L87 Difference]: Start difference. First operand 999 states and 3386 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) [2022-01-18 15:22:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:40,465 INFO L93 Difference]: Finished difference Result 1242 states and 4031 transitions. [2022-01-18 15:22:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:22:40,466 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 21 [2022-01-18 15:22:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:40,467 INFO L225 Difference]: With dead ends: 1242 [2022-01-18 15:22:40,468 INFO L226 Difference]: Without dead ends: 1190 [2022-01-18 15:22:40,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:40,468 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:40,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 88 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-01-18 15:22:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 947. [2022-01-18 15:22:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.3520084566596196) internal successors, (3171), 946 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3171 transitions. [2022-01-18 15:22:40,480 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3171 transitions. Word has length 21 [2022-01-18 15:22:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:40,480 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3171 transitions. [2022-01-18 15:22:40,480 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) [2022-01-18 15:22:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3171 transitions. [2022-01-18 15:22:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:40,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:40,481 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:40,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 15:22:40,697 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,SelfDestructingSolverStorable45 [2022-01-18 15:22:40,697 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1098970042, now seen corresponding path program 30 times [2022-01-18 15:22:40,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60811040] [2022-01-18 15:22:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:40,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:40,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:40,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60811040] [2022-01-18 15:22:40,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60811040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:40,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431052862] [2022-01-18 15:22:40,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:40,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:40,748 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) [2022-01-18 15:22:40,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:22:40,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:22:40,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:40,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 220 [2022-01-18 15:22:41,158 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 20 treesize of output 16 [2022-01-18 15:22:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:41,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:41,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:41,350 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-01-18 15:22:41,358 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 173 treesize of output 153 [2022-01-18 15:22:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:41,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431052862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:41,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:41,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:22:41,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633941027] [2022-01-18 15:22:41,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:41,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:22:41,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:22:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:41,541 INFO L87 Difference]: Start difference. First operand 947 states and 3171 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 15:22:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:41,685 INFO L93 Difference]: Finished difference Result 1315 states and 4207 transitions. [2022-01-18 15:22:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:22:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 [2022-01-18 15:22:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:41,687 INFO L225 Difference]: With dead ends: 1315 [2022-01-18 15:22:41,687 INFO L226 Difference]: Without dead ends: 1224 [2022-01-18 15:22:41,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:41,690 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:41,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 90 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-01-18 15:22:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 959. [2022-01-18 15:22:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.324634655532359) internal successors, (3185), 958 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3185 transitions. [2022-01-18 15:22:41,702 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3185 transitions. Word has length 21 [2022-01-18 15:22:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:41,702 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 3185 transitions. [2022-01-18 15:22:41,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 15:22:41,702 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3185 transitions. [2022-01-18 15:22:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:41,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:41,704 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:41,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:41,919 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,SelfDestructingSolverStorable46 [2022-01-18 15:22:41,919 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1054285416, now seen corresponding path program 31 times [2022-01-18 15:22:41,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:41,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100289127] [2022-01-18 15:22:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:41,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:41,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100289127] [2022-01-18 15:22:41,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100289127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224856104] [2022-01-18 15:22:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:41,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:41,997 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) [2022-01-18 15:22:41,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:22:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:42,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:42,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:42,342 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 20 treesize of output 16 [2022-01-18 15:22:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:42,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:42,773 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 378 treesize of output 322 [2022-01-18 15:22:42,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:42,784 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 329 treesize of output 295 [2022-01-18 15:22:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:43,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224856104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:43,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:43,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:22:43,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280301357] [2022-01-18 15:22:43,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:43,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:22:43,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:22:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:43,136 INFO L87 Difference]: Start difference. First operand 959 states and 3185 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 15:22:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:43,344 INFO L93 Difference]: Finished difference Result 1348 states and 4293 transitions. [2022-01-18 15:22:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:22:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 [2022-01-18 15:22:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:43,347 INFO L225 Difference]: With dead ends: 1348 [2022-01-18 15:22:43,347 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 15:22:43,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:43,347 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 157 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:43,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 132 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 15:22:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 979. [2022-01-18 15:22:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 3.3333333333333335) internal successors, (3260), 978 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3260 transitions. [2022-01-18 15:22:43,360 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3260 transitions. Word has length 21 [2022-01-18 15:22:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:43,361 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 3260 transitions. [2022-01-18 15:22:43,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 15:22:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3260 transitions. [2022-01-18 15:22:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:43,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:43,362 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:43,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:43,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:43,567 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash -701145926, now seen corresponding path program 32 times [2022-01-18 15:22:43,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840289160] [2022-01-18 15:22:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:43,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:43,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840289160] [2022-01-18 15:22:43,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840289160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346627595] [2022-01-18 15:22:43,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:43,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:43,640 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) [2022-01-18 15:22:43,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:22:43,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:43,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:43,835 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 264 treesize of output 224 [2022-01-18 15:22:44,021 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 33 treesize of output 25 [2022-01-18 15:22:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:44,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:44,353 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 252 treesize of output 224 [2022-01-18 15:22:44,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:44,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:44,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346627595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:44,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:44,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:22:44,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475252552] [2022-01-18 15:22:44,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:44,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:22:44,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:22:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:44,631 INFO L87 Difference]: Start difference. First operand 979 states and 3260 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 15:22:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:44,998 INFO L93 Difference]: Finished difference Result 1531 states and 4858 transitions. [2022-01-18 15:22:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 [2022-01-18 15:22:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:45,001 INFO L225 Difference]: With dead ends: 1531 [2022-01-18 15:22:45,001 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 15:22:45,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:45,001 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:45,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 143 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 15:22:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1021. [2022-01-18 15:22:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.384313725490196) internal successors, (3452), 1020 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3452 transitions. [2022-01-18 15:22:45,016 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3452 transitions. Word has length 21 [2022-01-18 15:22:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:45,016 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 3452 transitions. [2022-01-18 15:22:45,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 15:22:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3452 transitions. [2022-01-18 15:22:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:45,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:45,018 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:45,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:45,233 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,SelfDestructingSolverStorable48 [2022-01-18 15:22:45,233 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 972813656, now seen corresponding path program 33 times [2022-01-18 15:22:45,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:45,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43074133] [2022-01-18 15:22:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:45,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:45,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43074133] [2022-01-18 15:22:45,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43074133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58147933] [2022-01-18 15:22:45,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:45,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:45,301 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) [2022-01-18 15:22:45,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:22:45,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:45,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:22:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:45,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:45,654 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 219 treesize of output 187 [2022-01-18 15:22:45,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:45,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:45,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:46,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:46,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:22:46,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:46,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58147933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:46,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:46,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 15:22:46,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162972562] [2022-01-18 15:22:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:46,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:46,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:46,381 INFO L87 Difference]: Start difference. First operand 1021 states and 3452 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2022-01-18 15:22:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:47,288 INFO L93 Difference]: Finished difference Result 1875 states and 5735 transitions. [2022-01-18 15:22:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:22:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 21 [2022-01-18 15:22:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:47,292 INFO L225 Difference]: With dead ends: 1875 [2022-01-18 15:22:47,292 INFO L226 Difference]: Without dead ends: 1721 [2022-01-18 15:22:47,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:22:47,292 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 211 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:47,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 378 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:22:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-18 15:22:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 920. [2022-01-18 15:22:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.323177366702938) internal successors, (3054), 919 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3054 transitions. [2022-01-18 15:22:47,306 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3054 transitions. Word has length 21 [2022-01-18 15:22:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:47,306 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3054 transitions. [2022-01-18 15:22:47,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2022-01-18 15:22:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3054 transitions. [2022-01-18 15:22:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:47,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:47,308 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:47,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:47,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 15:22:47,519 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash -29373002, now seen corresponding path program 34 times [2022-01-18 15:22:47,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:47,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494694201] [2022-01-18 15:22:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:47,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:47,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494694201] [2022-01-18 15:22:47,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494694201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836618186] [2022-01-18 15:22:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:47,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:47,568 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) [2022-01-18 15:22:47,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:22:47,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:47,661 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 24 treesize of output 18 [2022-01-18 15:22:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:47,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:47,785 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 211 treesize of output 187 [2022-01-18 15:22:47,935 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:47,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836618186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:47,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:47,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 15:22:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075453121] [2022-01-18 15:22:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:47,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:22:47,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:22:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:22:47,939 INFO L87 Difference]: Start difference. First operand 920 states and 3054 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:48,067 INFO L93 Difference]: Finished difference Result 1245 states and 4036 transitions. [2022-01-18 15:22:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-01-18 15:22:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:48,068 INFO L225 Difference]: With dead ends: 1245 [2022-01-18 15:22:48,068 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 15:22:48,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:48,069 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:48,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 118 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 15:22:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 922. [2022-01-18 15:22:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3224755700325734) internal successors, (3060), 921 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3060 transitions. [2022-01-18 15:22:48,080 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3060 transitions. Word has length 21 [2022-01-18 15:22:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:48,080 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 3060 transitions. [2022-01-18 15:22:48,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3060 transitions. [2022-01-18 15:22:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:48,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:48,082 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:48,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 15:22:48,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:48,297 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2108758372, now seen corresponding path program 35 times [2022-01-18 15:22:48,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337250692] [2022-01-18 15:22:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:48,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:48,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337250692] [2022-01-18 15:22:48,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337250692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716027494] [2022-01-18 15:22:48,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:48,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:48,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:48,380 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) [2022-01-18 15:22:48,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:22:48,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:48,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:48,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:48,516 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 157 treesize of output 137 [2022-01-18 15:22:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:48,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:48,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:49,080 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:49,080 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 8 treesize of output 7 [2022-01-18 15:22:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716027494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:49,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:49,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:22:49,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530347590] [2022-01-18 15:22:49,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:49,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:22:49,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:22:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:22:49,087 INFO L87 Difference]: Start difference. First operand 922 states and 3060 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2022-01-18 15:22:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:49,243 INFO L93 Difference]: Finished difference Result 1452 states and 4693 transitions. [2022-01-18 15:22:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 21 [2022-01-18 15:22:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:49,245 INFO L225 Difference]: With dead ends: 1452 [2022-01-18 15:22:49,245 INFO L226 Difference]: Without dead ends: 1396 [2022-01-18 15:22:49,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:49,245 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:49,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 113 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-01-18 15:22:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 992. [2022-01-18 15:22:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.400605449041372) internal successors, (3370), 991 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3370 transitions. [2022-01-18 15:22:49,261 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3370 transitions. Word has length 21 [2022-01-18 15:22:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:49,261 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 3370 transitions. [2022-01-18 15:22:49,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2022-01-18 15:22:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3370 transitions. [2022-01-18 15:22:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:49,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:49,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:49,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 15:22:49,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:49,467 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:49,467 INFO L85 PathProgramCache]: Analyzing trace with hash 453752306, now seen corresponding path program 36 times [2022-01-18 15:22:49,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:49,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381712405] [2022-01-18 15:22:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:49,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:49,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:49,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381712405] [2022-01-18 15:22:49,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381712405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:49,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802468967] [2022-01-18 15:22:49,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:49,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:49,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:49,535 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) [2022-01-18 15:22:49,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:22:49,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:22:49,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:49,681 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 171 treesize of output 147 [2022-01-18 15:22:49,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 137 [2022-01-18 15:22:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:49,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:50,100 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 334 treesize of output 290 [2022-01-18 15:22:50,327 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:50,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:50,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802468967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:50,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:50,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:22:50,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570909052] [2022-01-18 15:22:50,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:50,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:22:50,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:50,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:22:50,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:22:50,335 INFO L87 Difference]: Start difference. First operand 992 states and 3370 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2022-01-18 15:22:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:50,564 INFO L93 Difference]: Finished difference Result 1351 states and 4368 transitions. [2022-01-18 15:22:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2022-01-18 15:22:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:50,566 INFO L225 Difference]: With dead ends: 1351 [2022-01-18 15:22:50,567 INFO L226 Difference]: Without dead ends: 1290 [2022-01-18 15:22:50,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:50,567 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:50,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 104 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-01-18 15:22:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 967. [2022-01-18 15:22:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.36231884057971) internal successors, (3248), 966 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3248 transitions. [2022-01-18 15:22:50,580 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3248 transitions. Word has length 21 [2022-01-18 15:22:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:50,580 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 3248 transitions. [2022-01-18 15:22:50,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2022-01-18 15:22:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3248 transitions. [2022-01-18 15:22:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:50,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:50,582 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:50,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:50,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:50,792 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1576434822, now seen corresponding path program 37 times [2022-01-18 15:22:50,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:50,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248932477] [2022-01-18 15:22:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:50,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:50,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248932477] [2022-01-18 15:22:50,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248932477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119338311] [2022-01-18 15:22:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:50,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:50,867 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) [2022-01-18 15:22:50,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:22:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:50,980 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 24 treesize of output 18 [2022-01-18 15:22:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:51,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:51,234 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 328 treesize of output 284 [2022-01-18 15:22:51,536 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:22:51,536 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 [2022-01-18 15:22:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:51,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119338311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:51,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:51,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:22:51,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055677567] [2022-01-18 15:22:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:51,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:22:51,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:22:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:22:51,542 INFO L87 Difference]: Start difference. First operand 967 states and 3248 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) [2022-01-18 15:22:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:51,755 INFO L93 Difference]: Finished difference Result 1248 states and 4051 transitions. [2022-01-18 15:22:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:51,755 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 [2022-01-18 15:22:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:51,757 INFO L225 Difference]: With dead ends: 1248 [2022-01-18 15:22:51,757 INFO L226 Difference]: Without dead ends: 1190 [2022-01-18 15:22:51,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:51,757 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:51,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 143 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-01-18 15:22:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 928. [2022-01-18 15:22:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.335490830636462) internal successors, (3092), 927 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3092 transitions. [2022-01-18 15:22:51,768 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3092 transitions. Word has length 21 [2022-01-18 15:22:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:51,768 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 3092 transitions. [2022-01-18 15:22:51,769 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) [2022-01-18 15:22:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3092 transitions. [2022-01-18 15:22:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:51,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:51,770 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:51,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:51,970 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,SelfDestructingSolverStorable53 [2022-01-18 15:22:51,970 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash 954086356, now seen corresponding path program 38 times [2022-01-18 15:22:51,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:51,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680118569] [2022-01-18 15:22:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:51,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:52,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:52,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680118569] [2022-01-18 15:22:52,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680118569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:52,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190634419] [2022-01-18 15:22:52,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:52,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:52,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:52,044 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) [2022-01-18 15:22:52,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:22:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:52,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:52,207 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 183 treesize of output 159 [2022-01-18 15:22:52,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:52,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:52,682 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 238 treesize of output 210 [2022-01-18 15:22:52,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:52,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 199 [2022-01-18 15:22:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190634419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:52,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:52,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:22:52,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674163416] [2022-01-18 15:22:52,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:52,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:52,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:52,892 INFO L87 Difference]: Start difference. First operand 928 states and 3092 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) [2022-01-18 15:22:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:53,003 INFO L93 Difference]: Finished difference Result 1313 states and 4240 transitions. [2022-01-18 15:22:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:53,003 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 [2022-01-18 15:22:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:53,005 INFO L225 Difference]: With dead ends: 1313 [2022-01-18 15:22:53,005 INFO L226 Difference]: Without dead ends: 1257 [2022-01-18 15:22:53,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:53,005 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:53,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 104 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-01-18 15:22:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 964. [2022-01-18 15:22:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.3883696780893042) internal successors, (3263), 963 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3263 transitions. [2022-01-18 15:22:53,017 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3263 transitions. Word has length 21 [2022-01-18 15:22:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:53,017 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 3263 transitions. [2022-01-18 15:22:53,017 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) [2022-01-18 15:22:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3263 transitions. [2022-01-18 15:22:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:53,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:53,019 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:53,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:53,234 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,SelfDestructingSolverStorable54 [2022-01-18 15:22:53,234 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash -700919710, now seen corresponding path program 39 times [2022-01-18 15:22:53,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:53,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691327625] [2022-01-18 15:22:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:53,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:53,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691327625] [2022-01-18 15:22:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691327625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039297998] [2022-01-18 15:22:53,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:53,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:53,300 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) [2022-01-18 15:22:53,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:22:53,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:53,437 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 183 treesize of output 159 [2022-01-18 15:22:53,582 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 30 treesize of output 24 [2022-01-18 15:22:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:53,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:53,855 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 211 treesize of output 187 [2022-01-18 15:22:53,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:53,862 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 180 [2022-01-18 15:22:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:54,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039297998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:54,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:54,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:22:54,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149394789] [2022-01-18 15:22:54,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:54,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:54,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:54,133 INFO L87 Difference]: Start difference. First operand 964 states and 3263 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) [2022-01-18 15:22:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:54,373 INFO L93 Difference]: Finished difference Result 1407 states and 4471 transitions. [2022-01-18 15:22:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:54,374 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 [2022-01-18 15:22:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:54,375 INFO L225 Difference]: With dead ends: 1407 [2022-01-18 15:22:54,375 INFO L226 Difference]: Without dead ends: 1346 [2022-01-18 15:22:54,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:54,376 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:54,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 161 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-01-18 15:22:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 932. [2022-01-18 15:22:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.3372717508055856) internal successors, (3107), 931 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3107 transitions. [2022-01-18 15:22:54,388 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3107 transitions. Word has length 21 [2022-01-18 15:22:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:54,388 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3107 transitions. [2022-01-18 15:22:54,388 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) [2022-01-18 15:22:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3107 transitions. [2022-01-18 15:22:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:54,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:54,390 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:54,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:54,602 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,SelfDestructingSolverStorable55 [2022-01-18 15:22:54,603 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -102830666, now seen corresponding path program 40 times [2022-01-18 15:22:54,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:54,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853215168] [2022-01-18 15:22:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:54,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:54,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853215168] [2022-01-18 15:22:54,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853215168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468032392] [2022-01-18 15:22:54,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:54,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:54,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:54,671 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) [2022-01-18 15:22:54,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:22:54,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:54,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:54,894 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 285 treesize of output 243 [2022-01-18 15:22:55,190 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 20 treesize of output 16 [2022-01-18 15:22:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:55,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:55,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:55,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:55,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:55,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468032392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:55,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:55,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:22:55,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115958998] [2022-01-18 15:22:55,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:55,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:22:55,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:55,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:22:55,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:22:55,650 INFO L87 Difference]: Start difference. First operand 932 states and 3107 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2022-01-18 15:22:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:55,833 INFO L93 Difference]: Finished difference Result 1201 states and 3843 transitions. [2022-01-18 15:22:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 21 [2022-01-18 15:22:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:55,835 INFO L225 Difference]: With dead ends: 1201 [2022-01-18 15:22:55,835 INFO L226 Difference]: Without dead ends: 1129 [2022-01-18 15:22:55,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:55,835 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:55,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 133 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-18 15:22:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 894. [2022-01-18 15:22:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.3292273236282193) internal successors, (2973), 893 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2973 transitions. [2022-01-18 15:22:55,846 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2973 transitions. Word has length 21 [2022-01-18 15:22:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:55,846 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 2973 transitions. [2022-01-18 15:22:55,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2022-01-18 15:22:55,846 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2973 transitions. [2022-01-18 15:22:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:55,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:55,847 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:55,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 15:22:56,051 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,SelfDestructingSolverStorable56 [2022-01-18 15:22:56,052 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1032203744, now seen corresponding path program 41 times [2022-01-18 15:22:56,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449041345] [2022-01-18 15:22:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:56,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:56,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449041345] [2022-01-18 15:22:56,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449041345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825623961] [2022-01-18 15:22:56,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:56,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:56,127 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) [2022-01-18 15:22:56,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:22:56,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:56,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:56,282 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 173 treesize of output 149 [2022-01-18 15:22:56,284 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 159 treesize of output 139 [2022-01-18 15:22:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:56,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:56,656 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 188 treesize of output 168 [2022-01-18 15:22:56,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:56,803 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 18 treesize of output 22 [2022-01-18 15:22:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:56,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825623961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:56,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:56,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:22:56,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542251835] [2022-01-18 15:22:56,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:56,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:22:56,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:22:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:56,830 INFO L87 Difference]: Start difference. First operand 894 states and 2973 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) [2022-01-18 15:22:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:57,050 INFO L93 Difference]: Finished difference Result 1220 states and 3917 transitions. [2022-01-18 15:22:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:57,050 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 21 [2022-01-18 15:22:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:57,052 INFO L225 Difference]: With dead ends: 1220 [2022-01-18 15:22:57,052 INFO L226 Difference]: Without dead ends: 1159 [2022-01-18 15:22:57,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:57,052 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:57,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 116 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-18 15:22:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 904. [2022-01-18 15:22:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.338870431893688) internal successors, (3015), 903 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3015 transitions. [2022-01-18 15:22:57,063 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3015 transitions. Word has length 21 [2022-01-18 15:22:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:57,063 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3015 transitions. [2022-01-18 15:22:57,063 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) [2022-01-18 15:22:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3015 transitions. [2022-01-18 15:22:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:57,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:57,065 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:57,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:57,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:57,268 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1588803970, now seen corresponding path program 42 times [2022-01-18 15:22:57,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:57,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742679997] [2022-01-18 15:22:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:57,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:57,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742679997] [2022-01-18 15:22:57,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742679997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396087277] [2022-01-18 15:22:57,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:57,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:57,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:57,336 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) [2022-01-18 15:22:57,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:22:57,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:57,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:57,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:57,497 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 171 treesize of output 147 [2022-01-18 15:22:57,500 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 157 treesize of output 137 [2022-01-18 15:22:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:57,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:57,735 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 211 treesize of output 187 [2022-01-18 15:22:57,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:57,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:22:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:57,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396087277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:57,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:57,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:22:57,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849634455] [2022-01-18 15:22:57,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:57,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:57,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:57,964 INFO L87 Difference]: Start difference. First operand 904 states and 3015 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) [2022-01-18 15:22:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:58,102 INFO L93 Difference]: Finished difference Result 1209 states and 3853 transitions. [2022-01-18 15:22:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:58,103 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 [2022-01-18 15:22:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:58,104 INFO L225 Difference]: With dead ends: 1209 [2022-01-18 15:22:58,104 INFO L226 Difference]: Without dead ends: 1157 [2022-01-18 15:22:58,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:58,105 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:58,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 83 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-18 15:22:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 871. [2022-01-18 15:22:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2896551724137932) internal successors, (2862), 870 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2862 transitions. [2022-01-18 15:22:58,116 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2862 transitions. Word has length 21 [2022-01-18 15:22:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:58,116 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 2862 transitions. [2022-01-18 15:22:58,116 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) [2022-01-18 15:22:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2862 transitions. [2022-01-18 15:22:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:58,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:58,117 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:58,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:58,333 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,SelfDestructingSolverStorable58 [2022-01-18 15:22:58,334 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:58,334 INFO L85 PathProgramCache]: Analyzing trace with hash -548568172, now seen corresponding path program 43 times [2022-01-18 15:22:58,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:58,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532850600] [2022-01-18 15:22:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:58,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:58,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532850600] [2022-01-18 15:22:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532850600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062059918] [2022-01-18 15:22:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:58,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:58,391 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) [2022-01-18 15:22:58,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:22:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:22:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:58,506 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 24 treesize of output 18 [2022-01-18 15:22:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:58,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:58,667 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 240 treesize of output 212 [2022-01-18 15:22:58,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:58,969 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 20 treesize of output 24 [2022-01-18 15:22:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:59,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062059918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:59,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:22:59,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611146208] [2022-01-18 15:22:59,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:59,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:59,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:59,002 INFO L87 Difference]: Start difference. First operand 871 states and 2862 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) [2022-01-18 15:22:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:59,181 INFO L93 Difference]: Finished difference Result 1063 states and 3402 transitions. [2022-01-18 15:22:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:59,181 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 [2022-01-18 15:22:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:59,183 INFO L225 Difference]: With dead ends: 1063 [2022-01-18 15:22:59,183 INFO L226 Difference]: Without dead ends: 1005 [2022-01-18 15:22:59,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:59,183 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:59,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 121 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-18 15:22:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 775. [2022-01-18 15:22:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.2700258397932815) internal successors, (2531), 774 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2531 transitions. [2022-01-18 15:22:59,192 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2531 transitions. Word has length 21 [2022-01-18 15:22:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:59,192 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2531 transitions. [2022-01-18 15:22:59,193 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) [2022-01-18 15:22:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2531 transitions. [2022-01-18 15:22:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:22:59,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:59,194 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:59,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:59,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 15:22:59,395 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash 216306962, now seen corresponding path program 44 times [2022-01-18 15:22:59,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:59,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340534084] [2022-01-18 15:22:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:59,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:59,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:59,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340534084] [2022-01-18 15:22:59,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340534084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:59,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498888308] [2022-01-18 15:22:59,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:59,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:59,477 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) [2022-01-18 15:22:59,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:22:59,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:22:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:59,599 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 17 treesize of output 13 [2022-01-18 15:22:59,637 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 22 treesize of output 16 [2022-01-18 15:22:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:59,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:59,742 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 193 treesize of output 169 [2022-01-18 15:22:59,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:59,912 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 19 treesize of output 23 [2022-01-18 15:22:59,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:22:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:22:59,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498888308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:59,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:59,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 15:22:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975794208] [2022-01-18 15:22:59,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:59,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:59,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:59,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:59,942 INFO L87 Difference]: Start difference. First operand 775 states and 2531 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) [2022-01-18 15:23:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:00,102 INFO L93 Difference]: Finished difference Result 973 states and 3109 transitions. [2022-01-18 15:23:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:23:00,102 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 [2022-01-18 15:23:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:00,103 INFO L225 Difference]: With dead ends: 973 [2022-01-18 15:23:00,103 INFO L226 Difference]: Without dead ends: 906 [2022-01-18 15:23:00,103 INFO L932 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 [2022-01-18 15:23:00,104 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:00,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 136 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-18 15:23:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 763. [2022-01-18 15:23:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.263779527559055) internal successors, (2487), 762 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2487 transitions. [2022-01-18 15:23:00,115 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2487 transitions. Word has length 21 [2022-01-18 15:23:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:00,116 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2487 transitions. [2022-01-18 15:23:00,116 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) [2022-01-18 15:23:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2487 transitions. [2022-01-18 15:23:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:00,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:00,117 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:00,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:00,331 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,SelfDestructingSolverStorable60 [2022-01-18 15:23:00,331 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1391797606, now seen corresponding path program 45 times [2022-01-18 15:23:00,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:00,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084717825] [2022-01-18 15:23:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:00,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:00,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084717825] [2022-01-18 15:23:00,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084717825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692312235] [2022-01-18 15:23:00,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:00,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:00,404 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) [2022-01-18 15:23:00,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:23:00,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:23:00,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:00,505 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 17 treesize of output 13 [2022-01-18 15:23:00,572 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 145 treesize of output 125 [2022-01-18 15:23:00,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:00,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:00,889 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 193 treesize of output 169 [2022-01-18 15:23:01,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:01,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:01,150 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 3 treesize of output 1 [2022-01-18 15:23:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:01,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692312235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:01,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:01,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-01-18 15:23:01,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074158431] [2022-01-18 15:23:01,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:01,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:23:01,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:23:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:23:01,180 INFO L87 Difference]: Start difference. First operand 763 states and 2487 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) [2022-01-18 15:23:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:01,358 INFO L93 Difference]: Finished difference Result 1036 states and 3248 transitions. [2022-01-18 15:23:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:23:01,358 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 [2022-01-18 15:23:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:01,360 INFO L225 Difference]: With dead ends: 1036 [2022-01-18 15:23:01,360 INFO L226 Difference]: Without dead ends: 982 [2022-01-18 15:23:01,360 INFO L932 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 [2022-01-18 15:23:01,360 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:01,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 95 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-18 15:23:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 755. [2022-01-18 15:23:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.2480106100795756) internal successors, (2449), 754 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2449 transitions. [2022-01-18 15:23:01,382 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2449 transitions. Word has length 21 [2022-01-18 15:23:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:01,382 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2449 transitions. [2022-01-18 15:23:01,382 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) [2022-01-18 15:23:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2449 transitions. [2022-01-18 15:23:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:01,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:01,383 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:01,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:01,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:01,586 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1289602956, now seen corresponding path program 46 times [2022-01-18 15:23:01,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:01,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852934785] [2022-01-18 15:23:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:01,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:01,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852934785] [2022-01-18 15:23:01,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852934785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344872964] [2022-01-18 15:23:01,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:01,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:01,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:01,675 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) [2022-01-18 15:23:01,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:23:01,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:01,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:01,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:02,004 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 165 treesize of output 141 [2022-01-18 15:23:02,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 131 [2022-01-18 15:23:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:02,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:02,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:02,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:02,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:02,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:02,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344872964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:02,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:02,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 15:23:02,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539320304] [2022-01-18 15:23:02,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:02,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:23:02,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:23:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:23:02,879 INFO L87 Difference]: Start difference. First operand 755 states and 2449 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) [2022-01-18 15:23:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:03,058 INFO L93 Difference]: Finished difference Result 963 states and 3011 transitions. [2022-01-18 15:23:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:23:03,058 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 [2022-01-18 15:23:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:03,060 INFO L225 Difference]: With dead ends: 963 [2022-01-18 15:23:03,060 INFO L226 Difference]: Without dead ends: 906 [2022-01-18 15:23:03,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:03,060 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:03,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 111 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-18 15:23:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 722. [2022-01-18 15:23:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.1941747572815533) internal successors, (2303), 721 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2303 transitions. [2022-01-18 15:23:03,080 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2303 transitions. Word has length 21 [2022-01-18 15:23:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:03,080 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 2303 transitions. [2022-01-18 15:23:03,080 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) [2022-01-18 15:23:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2303 transitions. [2022-01-18 15:23:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:03,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:03,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:03,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:03,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:03,281 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash -822698094, now seen corresponding path program 47 times [2022-01-18 15:23:03,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:03,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609969186] [2022-01-18 15:23:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:03,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:03,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609969186] [2022-01-18 15:23:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609969186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068207213] [2022-01-18 15:23:03,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:03,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:03,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:03,382 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) [2022-01-18 15:23:03,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:23:03,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:23:03,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:03,529 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 145 treesize of output 125 [2022-01-18 15:23:03,681 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 17 treesize of output 13 [2022-01-18 15:23:03,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:03,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 15:23:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:03,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:03,851 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 3 treesize of output 1 [2022-01-18 15:23:03,945 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 188 treesize of output 164 [2022-01-18 15:23:03,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:03,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 157 [2022-01-18 15:23:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:04,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068207213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:04,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:04,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-01-18 15:23:04,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725865443] [2022-01-18 15:23:04,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:04,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:23:04,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:23:04,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:23:04,197 INFO L87 Difference]: Start difference. First operand 722 states and 2303 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) [2022-01-18 15:23:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:04,442 INFO L93 Difference]: Finished difference Result 1016 states and 3105 transitions. [2022-01-18 15:23:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:04,442 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 [2022-01-18 15:23:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:04,443 INFO L225 Difference]: With dead ends: 1016 [2022-01-18 15:23:04,443 INFO L226 Difference]: Without dead ends: 964 [2022-01-18 15:23:04,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:04,443 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 108 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:04,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 98 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-01-18 15:23:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 732. [2022-01-18 15:23:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.1997264021887823) internal successors, (2339), 731 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2339 transitions. [2022-01-18 15:23:04,452 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2339 transitions. Word has length 21 [2022-01-18 15:23:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:04,452 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2339 transitions. [2022-01-18 15:23:04,452 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) [2022-01-18 15:23:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2339 transitions. [2022-01-18 15:23:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:04,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:04,453 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:04,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:04,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:04,669 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash 790868640, now seen corresponding path program 48 times [2022-01-18 15:23:04,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:04,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713670395] [2022-01-18 15:23:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:04,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:04,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:04,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713670395] [2022-01-18 15:23:04,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713670395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:04,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829142930] [2022-01-18 15:23:04,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:04,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:04,749 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) [2022-01-18 15:23:04,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:23:04,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:23:04,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:04,888 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 145 treesize of output 125 [2022-01-18 15:23:05,039 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 41 treesize of output 33 [2022-01-18 15:23:05,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:05,192 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 3 treesize of output 1 [2022-01-18 15:23:05,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:05,306 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 214 treesize of output 196 [2022-01-18 15:23:05,311 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 191 treesize of output 171 [2022-01-18 15:23:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829142930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:05,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 15:23:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563340781] [2022-01-18 15:23:05,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:05,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:23:05,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:23:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:23:05,613 INFO L87 Difference]: Start difference. First operand 732 states and 2339 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) [2022-01-18 15:23:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:05,883 INFO L93 Difference]: Finished difference Result 1080 states and 3233 transitions. [2022-01-18 15:23:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:23:05,883 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 [2022-01-18 15:23:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:05,885 INFO L225 Difference]: With dead ends: 1080 [2022-01-18 15:23:05,885 INFO L226 Difference]: Without dead ends: 1017 [2022-01-18 15:23:05,885 INFO L932 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 [2022-01-18 15:23:05,885 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:05,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-18 15:23:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 711. [2022-01-18 15:23:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.1577464788732392) internal successors, (2242), 710 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2242 transitions. [2022-01-18 15:23:05,894 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2242 transitions. Word has length 21 [2022-01-18 15:23:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2242 transitions. [2022-01-18 15:23:05,894 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) [2022-01-18 15:23:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2242 transitions. [2022-01-18 15:23:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:05,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:05,895 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:05,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:06,095 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,SelfDestructingSolverStorable64 [2022-01-18 15:23:06,096 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -728170158, now seen corresponding path program 49 times [2022-01-18 15:23:06,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:06,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236884938] [2022-01-18 15:23:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:06,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:06,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:06,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236884938] [2022-01-18 15:23:06,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236884938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:06,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977015085] [2022-01-18 15:23:06,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:06,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:06,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:06,197 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) [2022-01-18 15:23:06,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:23:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:06,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:06,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 253 [2022-01-18 15:23:06,638 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 17 treesize of output 13 [2022-01-18 15:23:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:06,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:23:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:06,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:06,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:06,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:06,964 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 255 treesize of output 233 [2022-01-18 15:23:06,970 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 228 treesize of output 204 [2022-01-18 15:23:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:07,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977015085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:07,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:07,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 15:23:07,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778513775] [2022-01-18 15:23:07,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:07,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:07,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:07,270 INFO L87 Difference]: Start difference. First operand 711 states and 2242 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) [2022-01-18 15:23:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:07,872 INFO L93 Difference]: Finished difference Result 1000 states and 3005 transitions. [2022-01-18 15:23:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:23:07,872 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 21 [2022-01-18 15:23:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:07,874 INFO L225 Difference]: With dead ends: 1000 [2022-01-18 15:23:07,874 INFO L226 Difference]: Without dead ends: 877 [2022-01-18 15:23:07,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:23:07,878 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:07,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 264 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-18 15:23:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 683. [2022-01-18 15:23:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.1524926686217007) internal successors, (2150), 682 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2150 transitions. [2022-01-18 15:23:07,886 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2150 transitions. Word has length 21 [2022-01-18 15:23:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:07,886 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2150 transitions. [2022-01-18 15:23:07,886 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) [2022-01-18 15:23:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2150 transitions. [2022-01-18 15:23:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:07,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:07,887 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:07,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:08,102 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,SelfDestructingSolverStorable65 [2022-01-18 15:23:08,102 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash -877934359, now seen corresponding path program 50 times [2022-01-18 15:23:08,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:08,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043940471] [2022-01-18 15:23:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:08,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:08,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043940471] [2022-01-18 15:23:08,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043940471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017550555] [2022-01-18 15:23:08,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:08,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:08,300 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) [2022-01-18 15:23:08,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:23:08,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:08,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:08,403 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 17 treesize of output 13 [2022-01-18 15:23:08,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 196 [2022-01-18 15:23:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:08,548 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 182 [2022-01-18 15:23:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:08,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:08,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 286 [2022-01-18 15:23:09,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:09,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:09,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:09,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017550555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:09,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:09,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 15:23:09,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791280372] [2022-01-18 15:23:09,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:09,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:09,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:09,297 INFO L87 Difference]: Start difference. First operand 683 states and 2150 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) [2022-01-18 15:23:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:09,701 INFO L93 Difference]: Finished difference Result 964 states and 2978 transitions. [2022-01-18 15:23:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:23:09,701 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 [2022-01-18 15:23:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:09,702 INFO L225 Difference]: With dead ends: 964 [2022-01-18 15:23:09,702 INFO L226 Difference]: Without dead ends: 867 [2022-01-18 15:23:09,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:09,703 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:09,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 123 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-18 15:23:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 724. [2022-01-18 15:23:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 3.1673582295988933) internal successors, (2290), 723 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2290 transitions. [2022-01-18 15:23:09,710 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2290 transitions. Word has length 21 [2022-01-18 15:23:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:09,711 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2290 transitions. [2022-01-18 15:23:09,711 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) [2022-01-18 15:23:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2290 transitions. [2022-01-18 15:23:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:09,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:09,712 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:09,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 15:23:09,912 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,SelfDestructingSolverStorable66 [2022-01-18 15:23:09,912 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash -642670283, now seen corresponding path program 51 times [2022-01-18 15:23:09,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:09,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712195917] [2022-01-18 15:23:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:09,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:10,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:10,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712195917] [2022-01-18 15:23:10,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712195917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:10,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19841832] [2022-01-18 15:23:10,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:10,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:10,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:10,060 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) [2022-01-18 15:23:10,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:23:10,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:10,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:10,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:10,297 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 181 treesize of output 157 [2022-01-18 15:23:10,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:10,300 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 147 [2022-01-18 15:23:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:10,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:10,697 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 193 treesize of output 173 [2022-01-18 15:23:10,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:10,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:10,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:11,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19841832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:11,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:11,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 15:23:11,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606750383] [2022-01-18 15:23:11,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:11,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:11,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:11,030 INFO L87 Difference]: Start difference. First operand 724 states and 2290 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) [2022-01-18 15:23:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:11,649 INFO L93 Difference]: Finished difference Result 1087 states and 3349 transitions. [2022-01-18 15:23:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:23:11,649 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 [2022-01-18 15:23:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:11,650 INFO L225 Difference]: With dead ends: 1087 [2022-01-18 15:23:11,650 INFO L226 Difference]: Without dead ends: 967 [2022-01-18 15:23:11,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:23:11,651 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:11,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 155 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-18 15:23:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 723. [2022-01-18 15:23:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.170360110803324) internal successors, (2289), 722 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2289 transitions. [2022-01-18 15:23:11,659 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2289 transitions. Word has length 21 [2022-01-18 15:23:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:11,659 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2289 transitions. [2022-01-18 15:23:11,659 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) [2022-01-18 15:23:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2289 transitions. [2022-01-18 15:23:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:11,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:11,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:11,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:11,860 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,SelfDestructingSolverStorable67 [2022-01-18 15:23:11,860 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 882266749, now seen corresponding path program 52 times [2022-01-18 15:23:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:11,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38687170] [2022-01-18 15:23:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:11,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:23:11,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38687170] [2022-01-18 15:23:11,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38687170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646917569] [2022-01-18 15:23:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:11,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:11,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:11,963 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) [2022-01-18 15:23:11,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:23:12,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:12,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:12,140 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 181 treesize of output 157 [2022-01-18 15:23:12,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:12,344 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 43 treesize of output 35 [2022-01-18 15:23:12,347 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 [2022-01-18 15:23:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:12,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:12,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:12,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:12,725 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 196 treesize of output 178 [2022-01-18 15:23:12,730 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 173 treesize of output 153 [2022-01-18 15:23:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:12,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646917569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:12,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:12,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:23:12,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660551312] [2022-01-18 15:23:12,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:12,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:12,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:12,994 INFO L87 Difference]: Start difference. First operand 723 states and 2289 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-01-18 15:23:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:13,813 INFO L93 Difference]: Finished difference Result 1289 states and 3843 transitions. [2022-01-18 15:23:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:23:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 [2022-01-18 15:23:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:13,815 INFO L225 Difference]: With dead ends: 1289 [2022-01-18 15:23:13,815 INFO L226 Difference]: Without dead ends: 1140 [2022-01-18 15:23:13,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:23:13,815 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:13,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 202 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 582 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-01-18 15:23:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-18 15:23:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 732. [2022-01-18 15:23:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.176470588235294) internal successors, (2322), 731 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2322 transitions. [2022-01-18 15:23:13,824 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2322 transitions. Word has length 21 [2022-01-18 15:23:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:13,824 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2322 transitions. [2022-01-18 15:23:13,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-01-18 15:23:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2322 transitions. [2022-01-18 15:23:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:13,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:13,826 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:13,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 15:23:14,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 15:23:14,026 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -498938725, now seen corresponding path program 53 times [2022-01-18 15:23:14,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:14,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442718765] [2022-01-18 15:23:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:14,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:14,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442718765] [2022-01-18 15:23:14,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442718765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81136190] [2022-01-18 15:23:14,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:14,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:14,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:14,123 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) [2022-01-18 15:23:14,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:23:14,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:14,282 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 171 treesize of output 147 [2022-01-18 15:23:14,439 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 17 treesize of output 13 [2022-01-18 15:23:14,441 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 41 treesize of output 33 [2022-01-18 15:23:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:14,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:14,647 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 3 treesize of output 1 [2022-01-18 15:23:14,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:14,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:14,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 194 [2022-01-18 15:23:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:14,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81136190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:14,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:14,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 15:23:14,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140346932] [2022-01-18 15:23:14,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:14,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:14,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:14,962 INFO L87 Difference]: Start difference. First operand 732 states and 2322 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2022-01-18 15:23:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:15,404 INFO L93 Difference]: Finished difference Result 1121 states and 3357 transitions. [2022-01-18 15:23:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:23:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 21 [2022-01-18 15:23:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:15,406 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 15:23:15,406 INFO L226 Difference]: Without dead ends: 985 [2022-01-18 15:23:15,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:23:15,406 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:15,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 191 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-18 15:23:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2022-01-18 15:23:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1872340425531913) internal successors, (2247), 705 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2247 transitions. [2022-01-18 15:23:15,415 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2247 transitions. Word has length 21 [2022-01-18 15:23:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:15,415 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2247 transitions. [2022-01-18 15:23:15,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2022-01-18 15:23:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2247 transitions. [2022-01-18 15:23:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:15,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:15,417 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:15,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:15,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 15:23:15,632 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 921136774, now seen corresponding path program 54 times [2022-01-18 15:23:15,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023603898] [2022-01-18 15:23:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:15,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:15,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:15,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023603898] [2022-01-18 15:23:15,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023603898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:15,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712903397] [2022-01-18 15:23:15,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:15,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:15,684 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) [2022-01-18 15:23:15,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:23:15,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:15,786 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 17 treesize of output 13 [2022-01-18 15:23:15,871 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 22 treesize of output 16 [2022-01-18 15:23:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:15,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:16,020 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 211 treesize of output 191 [2022-01-18 15:23:16,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:16,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:16,445 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 3 treesize of output 1 [2022-01-18 15:23:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:16,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712903397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:16,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:16,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:23:16,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123652264] [2022-01-18 15:23:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:16,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:23:16,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:16,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:23:16,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:23:16,464 INFO L87 Difference]: Start difference. First operand 706 states and 2247 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) [2022-01-18 15:23:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:16,612 INFO L93 Difference]: Finished difference Result 835 states and 2620 transitions. [2022-01-18 15:23:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:23:16,612 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 [2022-01-18 15:23:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:16,613 INFO L225 Difference]: With dead ends: 835 [2022-01-18 15:23:16,613 INFO L226 Difference]: Without dead ends: 772 [2022-01-18 15:23:16,613 INFO L932 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 [2022-01-18 15:23:16,613 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:16,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 107 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-18 15:23:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 679. [2022-01-18 15:23:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.1976401179941) internal successors, (2168), 678 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2168 transitions. [2022-01-18 15:23:16,621 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2168 transitions. Word has length 21 [2022-01-18 15:23:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:16,621 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2168 transitions. [2022-01-18 15:23:16,621 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) [2022-01-18 15:23:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2168 transitions. [2022-01-18 15:23:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:16,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:16,622 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:16,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:16,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:16,833 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash -163255560, now seen corresponding path program 55 times [2022-01-18 15:23:16,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:16,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808956248] [2022-01-18 15:23:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:16,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:16,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:16,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808956248] [2022-01-18 15:23:16,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808956248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786141622] [2022-01-18 15:23:16,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:16,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:16,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:16,936 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) [2022-01-18 15:23:16,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:23:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:17,039 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 17 treesize of output 13 [2022-01-18 15:23:17,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:17,151 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 151 treesize of output 131 [2022-01-18 15:23:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:17,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:17,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:17,804 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:23:17,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:17,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786141622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:17,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:17,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:23:17,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980513442] [2022-01-18 15:23:17,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:17,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:23:17,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:23:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:23:17,844 INFO L87 Difference]: Start difference. First operand 679 states and 2168 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) [2022-01-18 15:23:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:17,974 INFO L93 Difference]: Finished difference Result 962 states and 2972 transitions. [2022-01-18 15:23:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:23:17,974 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 [2022-01-18 15:23:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:17,976 INFO L225 Difference]: With dead ends: 962 [2022-01-18 15:23:17,976 INFO L226 Difference]: Without dead ends: 898 [2022-01-18 15:23:17,976 INFO L932 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 [2022-01-18 15:23:17,976 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:17,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 95 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-18 15:23:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 679. [2022-01-18 15:23:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.1946902654867255) internal successors, (2166), 678 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2166 transitions. [2022-01-18 15:23:17,984 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2166 transitions. Word has length 21 [2022-01-18 15:23:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:17,984 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2166 transitions. [2022-01-18 15:23:17,984 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) [2022-01-18 15:23:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2166 transitions. [2022-01-18 15:23:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:17,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:17,991 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:18,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:18,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:18,196 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1917216036, now seen corresponding path program 56 times [2022-01-18 15:23:18,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374182957] [2022-01-18 15:23:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:18,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:18,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374182957] [2022-01-18 15:23:18,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374182957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548167771] [2022-01-18 15:23:18,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:18,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:18,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:18,281 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) [2022-01-18 15:23:18,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:23:18,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:18,410 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 173 treesize of output 149 [2022-01-18 15:23:18,535 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 41 treesize of output 33 [2022-01-18 15:23:18,537 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 17 treesize of output 13 [2022-01-18 15:23:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:18,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:18,643 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 3 treesize of output 1 [2022-01-18 15:23:18,712 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 164 treesize of output 144 [2022-01-18 15:23:18,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:18,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:18,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548167771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:18,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:18,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:23:18,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193573878] [2022-01-18 15:23:18,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:18,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:23:18,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:23:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:23:18,932 INFO L87 Difference]: Start difference. First operand 679 states and 2166 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) [2022-01-18 15:23:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:19,017 INFO L93 Difference]: Finished difference Result 925 states and 2831 transitions. [2022-01-18 15:23:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:23:19,017 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 [2022-01-18 15:23:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:19,018 INFO L225 Difference]: With dead ends: 925 [2022-01-18 15:23:19,018 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 15:23:19,018 INFO L932 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 [2022-01-18 15:23:19,018 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 143 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:19,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 80 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 15:23:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 634. [2022-01-18 15:23:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.1248025276461298) internal successors, (1978), 633 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1978 transitions. [2022-01-18 15:23:19,026 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1978 transitions. Word has length 21 [2022-01-18 15:23:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:19,026 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1978 transitions. [2022-01-18 15:23:19,026 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) [2022-01-18 15:23:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1978 transitions. [2022-01-18 15:23:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:19,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:19,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:19,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:19,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:19,242 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:19,242 INFO L85 PathProgramCache]: Analyzing trace with hash -590424302, now seen corresponding path program 57 times [2022-01-18 15:23:19,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:19,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339354873] [2022-01-18 15:23:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:19,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:19,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339354873] [2022-01-18 15:23:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339354873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230298771] [2022-01-18 15:23:19,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:19,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:19,428 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) [2022-01-18 15:23:19,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:23:19,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:23:19,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:19,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:19,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:19,774 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 41 treesize of output 33 [2022-01-18 15:23:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:19,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:19,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:19,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:19,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:19,989 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 151 treesize of output 141 [2022-01-18 15:23:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:20,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230298771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:20,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:20,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-01-18 15:23:20,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936132675] [2022-01-18 15:23:20,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:20,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:20,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:20,261 INFO L87 Difference]: Start difference. First operand 634 states and 1978 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-01-18 15:23:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:21,289 INFO L93 Difference]: Finished difference Result 1108 states and 3182 transitions. [2022-01-18 15:23:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:23:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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 [2022-01-18 15:23:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:21,290 INFO L225 Difference]: With dead ends: 1108 [2022-01-18 15:23:21,290 INFO L226 Difference]: Without dead ends: 945 [2022-01-18 15:23:21,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:23:21,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 218 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:21,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 270 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-18 15:23:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 638. [2022-01-18 15:23:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 3.1020408163265305) internal successors, (1976), 637 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1976 transitions. [2022-01-18 15:23:21,299 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1976 transitions. Word has length 21 [2022-01-18 15:23:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:21,299 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1976 transitions. [2022-01-18 15:23:21,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-01-18 15:23:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1976 transitions. [2022-01-18 15:23:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:23:21,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:21,300 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:21,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:21,500 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,SelfDestructingSolverStorable73 [2022-01-18 15:23:21,500 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 224593503, now seen corresponding path program 58 times [2022-01-18 15:23:21,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976547078] [2022-01-18 15:23:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:21,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:21,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:21,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976547078] [2022-01-18 15:23:21,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976547078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:21,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337672990] [2022-01-18 15:23:21,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:21,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:21,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:21,657 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) [2022-01-18 15:23:21,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:23:21,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:21,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:21,760 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 17 treesize of output 13 [2022-01-18 15:23:21,845 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 171 treesize of output 145 [2022-01-18 15:23:21,848 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 145 treesize of output 127 [2022-01-18 15:23:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:22,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:22,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 269 [2022-01-18 15:23:22,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:22,620 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 21 treesize of output 25 [2022-01-18 15:23:22,642 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 3 treesize of output 1 [2022-01-18 15:23:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:22,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337672990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:22,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:22,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:23:22,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324039240] [2022-01-18 15:23:22,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:22,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:22,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:22,669 INFO L87 Difference]: Start difference. First operand 638 states and 1976 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) [2022-01-18 15:23:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:23,594 INFO L93 Difference]: Finished difference Result 1340 states and 3987 transitions. [2022-01-18 15:23:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:23:23,594 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 [2022-01-18 15:23:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:23,596 INFO L225 Difference]: With dead ends: 1340 [2022-01-18 15:23:23,596 INFO L226 Difference]: Without dead ends: 1209 [2022-01-18 15:23:23,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:23:23,596 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 151 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:23,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 400 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:23:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-01-18 15:23:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 633. [2022-01-18 15:23:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.098101265822785) internal successors, (1958), 632 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1958 transitions. [2022-01-18 15:23:23,605 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1958 transitions. Word has length 21 [2022-01-18 15:23:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:23,605 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1958 transitions. [2022-01-18 15:23:23,605 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) [2022-01-18 15:23:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1958 transitions. [2022-01-18 15:23:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:23,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:23,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:23,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 15:23:23,806 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,SelfDestructingSolverStorable74 [2022-01-18 15:23:23,806 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1282730021, now seen corresponding path program 59 times [2022-01-18 15:23:23,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810666972] [2022-01-18 15:23:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:23,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:23:23,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810666972] [2022-01-18 15:23:23,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810666972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355057157] [2022-01-18 15:23:23,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:23,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:23,901 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) [2022-01-18 15:23:23,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:23:23,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:23:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:24,133 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 42 treesize of output 34 [2022-01-18 15:23:24,301 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 39 treesize of output 31 [2022-01-18 15:23:24,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:24,503 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:24,503 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 [2022-01-18 15:23:24,602 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:24,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:24,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:24,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355057157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:24,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:24,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 15:23:24,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541783469] [2022-01-18 15:23:24,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:24,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:24,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:24,666 INFO L87 Difference]: Start difference. First operand 633 states and 1958 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) [2022-01-18 15:23:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:25,525 INFO L93 Difference]: Finished difference Result 1169 states and 3449 transitions. [2022-01-18 15:23:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:25,525 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 [2022-01-18 15:23:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:25,527 INFO L225 Difference]: With dead ends: 1169 [2022-01-18 15:23:25,527 INFO L226 Difference]: Without dead ends: 1051 [2022-01-18 15:23:25,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:23:25,527 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 272 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:25,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 230 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:23:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-01-18 15:23:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 621. [2022-01-18 15:23:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 3.0661290322580643) internal successors, (1901), 620 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1901 transitions. [2022-01-18 15:23:25,536 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1901 transitions. Word has length 22 [2022-01-18 15:23:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:25,537 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1901 transitions. [2022-01-18 15:23:25,537 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) [2022-01-18 15:23:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1901 transitions. [2022-01-18 15:23:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:25,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:25,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:25,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 15:23:25,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:25,751 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1147863917, now seen corresponding path program 60 times [2022-01-18 15:23:25,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:25,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906510990] [2022-01-18 15:23:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:25,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:25,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906510990] [2022-01-18 15:23:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906510990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455252285] [2022-01-18 15:23:25,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:25,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:25,878 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) [2022-01-18 15:23:25,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:23:25,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:25,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:25,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:25,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:26,121 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 39 treesize of output 31 [2022-01-18 15:23:26,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:26,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:26,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:26,362 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:26,362 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 15:23:26,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:26,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:26,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:26,434 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 43 treesize of output 41 [2022-01-18 15:23:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:26,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455252285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:26,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:26,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 15:23:26,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690936597] [2022-01-18 15:23:26,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:26,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:26,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:26,498 INFO L87 Difference]: Start difference. First operand 621 states and 1901 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) [2022-01-18 15:23:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:27,819 INFO L93 Difference]: Finished difference Result 1197 states and 3470 transitions. [2022-01-18 15:23:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:23:27,819 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 [2022-01-18 15:23:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:27,822 INFO L225 Difference]: With dead ends: 1197 [2022-01-18 15:23:27,822 INFO L226 Difference]: Without dead ends: 1053 [2022-01-18 15:23:27,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:23:27,822 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 267 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:27,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 269 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:27,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-18 15:23:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 614. [2022-01-18 15:23:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.0489396411092984) internal successors, (1869), 613 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1869 transitions. [2022-01-18 15:23:27,831 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1869 transitions. Word has length 22 [2022-01-18 15:23:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:27,831 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1869 transitions. [2022-01-18 15:23:27,831 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) [2022-01-18 15:23:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1869 transitions. [2022-01-18 15:23:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:27,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:27,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:27,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:28,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:28,048 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2060685251, now seen corresponding path program 61 times [2022-01-18 15:23:28,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:28,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257109757] [2022-01-18 15:23:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:28,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:28,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257109757] [2022-01-18 15:23:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257109757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694379393] [2022-01-18 15:23:28,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:28,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:28,160 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) [2022-01-18 15:23:28,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:23:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:28,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:28,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:28,666 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:28,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:28,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:28,769 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 47 treesize of output 45 [2022-01-18 15:23:28,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:28,777 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 43 treesize of output 41 [2022-01-18 15:23:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:28,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694379393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:28,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:28,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 15:23:28,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287089722] [2022-01-18 15:23:28,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:28,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:28,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:28,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:28,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:28,881 INFO L87 Difference]: Start difference. First operand 614 states and 1869 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) [2022-01-18 15:23:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:29,625 INFO L93 Difference]: Finished difference Result 942 states and 2778 transitions. [2022-01-18 15:23:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:23:29,626 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 [2022-01-18 15:23:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:29,627 INFO L225 Difference]: With dead ends: 942 [2022-01-18 15:23:29,627 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 15:23:29,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:23:29,627 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:29,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 192 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 15:23:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 614. [2022-01-18 15:23:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.0375203915171287) internal successors, (1862), 613 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1862 transitions. [2022-01-18 15:23:29,656 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1862 transitions. Word has length 22 [2022-01-18 15:23:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:29,656 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1862 transitions. [2022-01-18 15:23:29,657 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) [2022-01-18 15:23:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1862 transitions. [2022-01-18 15:23:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:29,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:29,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:29,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:29,873 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,SelfDestructingSolverStorable77 [2022-01-18 15:23:29,873 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:29,874 INFO L85 PathProgramCache]: Analyzing trace with hash -477873133, now seen corresponding path program 62 times [2022-01-18 15:23:29,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:29,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301199468] [2022-01-18 15:23:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:29,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:29,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301199468] [2022-01-18 15:23:29,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301199468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238326281] [2022-01-18 15:23:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:29,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:29,929 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) [2022-01-18 15:23:29,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:23:30,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:30,147 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 39 treesize of output 31 [2022-01-18 15:23:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:30,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:30,368 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:30,368 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 7 treesize of output 3 [2022-01-18 15:23:30,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:30,446 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:23:30,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:30,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:30,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238326281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:30,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:30,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 15:23:30,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461573998] [2022-01-18 15:23:30,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:30,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:30,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:30,494 INFO L87 Difference]: Start difference. First operand 614 states and 1862 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) [2022-01-18 15:23:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:31,483 INFO L93 Difference]: Finished difference Result 1251 states and 3666 transitions. [2022-01-18 15:23:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:23:31,483 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 [2022-01-18 15:23:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:31,485 INFO L225 Difference]: With dead ends: 1251 [2022-01-18 15:23:31,485 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 15:23:31,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=1601, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:23:31,485 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 203 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:31,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 342 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 15:23:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 516. [2022-01-18 15:23:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.0699029126213593) internal successors, (1581), 515 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1581 transitions. [2022-01-18 15:23:31,493 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1581 transitions. Word has length 22 [2022-01-18 15:23:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:31,493 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1581 transitions. [2022-01-18 15:23:31,493 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) [2022-01-18 15:23:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1581 transitions. [2022-01-18 15:23:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:31,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:31,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:31,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:31,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 15:23:31,707 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1263541605, now seen corresponding path program 63 times [2022-01-18 15:23:31,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:31,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804194423] [2022-01-18 15:23:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:31,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:31,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804194423] [2022-01-18 15:23:31,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804194423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393073185] [2022-01-18 15:23:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:31,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:31,927 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) [2022-01-18 15:23:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:23:32,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:23:32,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:32,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:32,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:23:32,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:32,542 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:23:32,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:32,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:23:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:32,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:32,801 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:32,801 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 7 treesize of output 3 [2022-01-18 15:23:32,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:32,879 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:23:32,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:32,887 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 15:23:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:32,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393073185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:32,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:32,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 15:23:32,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342022909] [2022-01-18 15:23:32,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:32,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:32,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:32,997 INFO L87 Difference]: Start difference. First operand 516 states and 1581 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) [2022-01-18 15:23:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:33,265 INFO L93 Difference]: Finished difference Result 749 states and 2218 transitions. [2022-01-18 15:23:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:33,266 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 [2022-01-18 15:23:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:33,267 INFO L225 Difference]: With dead ends: 749 [2022-01-18 15:23:33,267 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 15:23:33,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:33,267 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:33,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 166 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 400 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-01-18 15:23:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 15:23:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 527. [2022-01-18 15:23:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.093155893536122) internal successors, (1627), 526 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1627 transitions. [2022-01-18 15:23:33,273 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1627 transitions. Word has length 22 [2022-01-18 15:23:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:33,273 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1627 transitions. [2022-01-18 15:23:33,274 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) [2022-01-18 15:23:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1627 transitions. [2022-01-18 15:23:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:33,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:33,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:33,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:33,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:33,475 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1536822727, now seen corresponding path program 64 times [2022-01-18 15:23:33,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:33,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057282439] [2022-01-18 15:23:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:33,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:33,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057282439] [2022-01-18 15:23:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057282439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308561015] [2022-01-18 15:23:33,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:33,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:33,666 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) [2022-01-18 15:23:33,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:23:33,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:33,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:33,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:34,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:34,052 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 15:23:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:34,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:23:34,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:34,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:23:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:34,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:34,381 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:34,381 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 7 treesize of output 3 [2022-01-18 15:23:34,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:34,457 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 47 treesize of output 45 [2022-01-18 15:23:34,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:34,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:34,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308561015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:34,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:34,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 15:23:34,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487000422] [2022-01-18 15:23:34,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:34,593 INFO L87 Difference]: Start difference. First operand 527 states and 1627 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) [2022-01-18 15:23:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:34,867 INFO L93 Difference]: Finished difference Result 704 states and 2090 transitions. [2022-01-18 15:23:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:34,868 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 [2022-01-18 15:23:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:34,869 INFO L225 Difference]: With dead ends: 704 [2022-01-18 15:23:34,869 INFO L226 Difference]: Without dead ends: 694 [2022-01-18 15:23:34,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:34,869 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:34,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 141 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 303 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-01-18 15:23:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-18 15:23:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 534. [2022-01-18 15:23:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.073170731707317) internal successors, (1638), 533 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1638 transitions. [2022-01-18 15:23:34,876 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1638 transitions. Word has length 22 [2022-01-18 15:23:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:34,876 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1638 transitions. [2022-01-18 15:23:34,876 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) [2022-01-18 15:23:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1638 transitions. [2022-01-18 15:23:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:34,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:34,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:34,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:35,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:35,083 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -495747535, now seen corresponding path program 65 times [2022-01-18 15:23:35,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297446437] [2022-01-18 15:23:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:35,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:35,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297446437] [2022-01-18 15:23:35,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297446437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858923664] [2022-01-18 15:23:35,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:35,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:35,294 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) [2022-01-18 15:23:35,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:23:35,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:23:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:35,536 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 42 treesize of output 34 [2022-01-18 15:23:35,638 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 45 treesize of output 35 [2022-01-18 15:23:35,640 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 39 treesize of output 33 [2022-01-18 15:23:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:35,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:35,848 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:23:35,848 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 15:23:35,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:35,915 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 [2022-01-18 15:23:35,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:35,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:35,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858923664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:35,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:35,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 15:23:35,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329439827] [2022-01-18 15:23:35,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:35,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:23:35,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:23:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:35,979 INFO L87 Difference]: Start difference. First operand 534 states and 1638 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-01-18 15:23:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:36,689 INFO L93 Difference]: Finished difference Result 1283 states and 3687 transitions. [2022-01-18 15:23:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:23:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 [2022-01-18 15:23:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:36,691 INFO L225 Difference]: With dead ends: 1283 [2022-01-18 15:23:36,691 INFO L226 Difference]: Without dead ends: 1252 [2022-01-18 15:23:36,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:23:36,692 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 243 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:36,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 440 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:23:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-01-18 15:23:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 522. [2022-01-18 15:23:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.0863723608445297) internal successors, (1608), 521 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1608 transitions. [2022-01-18 15:23:36,700 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1608 transitions. Word has length 22 [2022-01-18 15:23:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:36,700 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1608 transitions. [2022-01-18 15:23:36,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-01-18 15:23:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1608 transitions. [2022-01-18 15:23:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:36,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:36,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:36,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:36,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:36,916 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1556525625, now seen corresponding path program 66 times [2022-01-18 15:23:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:36,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863174910] [2022-01-18 15:23:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:36,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:37,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863174910] [2022-01-18 15:23:37,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863174910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517948484] [2022-01-18 15:23:37,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:37,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:37,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:37,052 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) [2022-01-18 15:23:37,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:23:37,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:37,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:37,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:37,270 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 231 treesize of output 203 [2022-01-18 15:23:37,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:23:37,495 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 43 treesize of output 35 [2022-01-18 15:23:37,497 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 17 treesize of output 13 [2022-01-18 15:23:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:37,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:37,691 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 [2022-01-18 15:23:37,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:37,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:37,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:23:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517948484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:38,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:38,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:23:38,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743890291] [2022-01-18 15:23:38,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:38,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:38,122 INFO L87 Difference]: Start difference. First operand 522 states and 1608 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) [2022-01-18 15:23:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:38,215 INFO L93 Difference]: Finished difference Result 667 states and 2001 transitions. [2022-01-18 15:23:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:23:38,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 [2022-01-18 15:23:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:38,216 INFO L225 Difference]: With dead ends: 667 [2022-01-18 15:23:38,216 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 15:23:38,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:38,217 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:38,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 80 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 221 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-01-18 15:23:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 15:23:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 492. [2022-01-18 15:23:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.061099796334012) internal successors, (1503), 491 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1503 transitions. [2022-01-18 15:23:38,222 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1503 transitions. Word has length 22 [2022-01-18 15:23:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:38,223 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1503 transitions. [2022-01-18 15:23:38,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) [2022-01-18 15:23:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1503 transitions. [2022-01-18 15:23:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:38,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:38,223 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:38,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:38,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:38,440 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -525305780, now seen corresponding path program 67 times [2022-01-18 15:23:38,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853879968] [2022-01-18 15:23:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:38,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:23:38,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853879968] [2022-01-18 15:23:38,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853879968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481873827] [2022-01-18 15:23:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:38,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:38,540 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) [2022-01-18 15:23:38,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:23:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:38,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:23:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:38,671 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 17 treesize of output 13 [2022-01-18 15:23:38,755 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 165 treesize of output 141 [2022-01-18 15:23:38,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 131 [2022-01-18 15:23:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:23:38,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:39,059 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 164 treesize of output 144 [2022-01-18 15:23:39,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:39,474 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 19 treesize of output 23 [2022-01-18 15:23:39,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:23:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481873827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:39,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:39,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:23:39,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842165724] [2022-01-18 15:23:39,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:39,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:23:39,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:23:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:23:39,520 INFO L87 Difference]: Start difference. First operand 492 states and 1503 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) [2022-01-18 15:23:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:39,675 INFO L93 Difference]: Finished difference Result 617 states and 1837 transitions. [2022-01-18 15:23:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:23:39,675 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 [2022-01-18 15:23:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:39,676 INFO L225 Difference]: With dead ends: 617 [2022-01-18 15:23:39,676 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 15:23:39,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:23:39,676 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:39,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 88 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 15:23:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2022-01-18 15:23:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.008869179600887) internal successors, (1357), 451 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1357 transitions. [2022-01-18 15:23:39,681 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1357 transitions. Word has length 22 [2022-01-18 15:23:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:39,681 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1357 transitions. [2022-01-18 15:23:39,681 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) [2022-01-18 15:23:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1357 transitions. [2022-01-18 15:23:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:39,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:39,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:39,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 15:23:39,899 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,SelfDestructingSolverStorable83 [2022-01-18 15:23:39,899 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222629, now seen corresponding path program 68 times [2022-01-18 15:23:39,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:39,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151354474] [2022-01-18 15:23:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:39,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:39,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:39,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151354474] [2022-01-18 15:23:39,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151354474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:39,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817864074] [2022-01-18 15:23:39,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:39,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:39,976 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) [2022-01-18 15:23:39,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:23:40,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:40,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:40,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:40,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:40,369 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 13 treesize of output 17 [2022-01-18 15:23:40,423 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:40,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:40,426 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 [2022-01-18 15:23:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:40,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817864074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:40,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:40,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:23:40,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147770579] [2022-01-18 15:23:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:40,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:40,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:40,430 INFO L87 Difference]: Start difference. First operand 452 states and 1357 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) [2022-01-18 15:23:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:40,740 INFO L93 Difference]: Finished difference Result 836 states and 2417 transitions. [2022-01-18 15:23:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:23:40,740 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 [2022-01-18 15:23:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:40,741 INFO L225 Difference]: With dead ends: 836 [2022-01-18 15:23:40,742 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 15:23:40,742 INFO L932 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 [2022-01-18 15:23:40,742 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 188 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:40,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 184 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 15:23:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 467. [2022-01-18 15:23:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 15:23:40,749 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 15:23:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:40,749 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 15:23:40,749 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) [2022-01-18 15:23:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 15:23:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:40,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:40,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:40,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 15:23:40,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:40,951 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash -260222965, now seen corresponding path program 69 times [2022-01-18 15:23:40,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:40,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62337306] [2022-01-18 15:23:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:40,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:41,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:41,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62337306] [2022-01-18 15:23:41,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62337306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:41,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308771520] [2022-01-18 15:23:41,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:41,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:41,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:41,016 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) [2022-01-18 15:23:41,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:23:41,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:41,224 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 20 treesize of output 14 [2022-01-18 15:23:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:41,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:41,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:41,354 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 13 treesize of output 17 [2022-01-18 15:23:41,387 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:41,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:41,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308771520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:41,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:41,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:41,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189273134] [2022-01-18 15:23:41,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:41,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:41,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:41,393 INFO L87 Difference]: Start difference. First operand 467 states and 1402 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) [2022-01-18 15:23:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:41,735 INFO L93 Difference]: Finished difference Result 910 states and 2635 transitions. [2022-01-18 15:23:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:23:41,735 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 [2022-01-18 15:23:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:41,736 INFO L225 Difference]: With dead ends: 910 [2022-01-18 15:23:41,736 INFO L226 Difference]: Without dead ends: 910 [2022-01-18 15:23:41,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:23:41,737 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:41,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 283 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-01-18 15:23:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2022-01-18 15:23:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0334728033472804) internal successors, (1450), 478 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1450 transitions. [2022-01-18 15:23:41,743 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1450 transitions. Word has length 22 [2022-01-18 15:23:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:41,744 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1450 transitions. [2022-01-18 15:23:41,744 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) [2022-01-18 15:23:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1450 transitions. [2022-01-18 15:23:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:41,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:41,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:41,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:41,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:41,948 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1234379999, now seen corresponding path program 70 times [2022-01-18 15:23:41,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74012000] [2022-01-18 15:23:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:41,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:42,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74012000] [2022-01-18 15:23:42,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74012000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:42,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901125502] [2022-01-18 15:23:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:42,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:42,014 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) [2022-01-18 15:23:42,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:23:42,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:42,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:42,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:42,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:42,313 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 13 treesize of output 17 [2022-01-18 15:23:42,346 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:42,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:42,348 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 [2022-01-18 15:23:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901125502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:42,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:42,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:23:42,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487673037] [2022-01-18 15:23:42,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:42,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:42,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:42,351 INFO L87 Difference]: Start difference. First operand 479 states and 1450 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) [2022-01-18 15:23:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:42,702 INFO L93 Difference]: Finished difference Result 873 states and 2532 transitions. [2022-01-18 15:23:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:23:42,703 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 [2022-01-18 15:23:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:42,704 INFO L225 Difference]: With dead ends: 873 [2022-01-18 15:23:42,704 INFO L226 Difference]: Without dead ends: 863 [2022-01-18 15:23:42,704 INFO L932 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 [2022-01-18 15:23:42,704 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 214 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:42,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 207 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-18 15:23:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 486. [2022-01-18 15:23:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0185567010309278) internal successors, (1464), 485 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1464 transitions. [2022-01-18 15:23:42,710 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1464 transitions. Word has length 22 [2022-01-18 15:23:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:42,710 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1464 transitions. [2022-01-18 15:23:42,710 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) [2022-01-18 15:23:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1464 transitions. [2022-01-18 15:23:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:42,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:42,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:42,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:42,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:42,918 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash 915267679, now seen corresponding path program 71 times [2022-01-18 15:23:42,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:42,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193507983] [2022-01-18 15:23:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:42,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193507983] [2022-01-18 15:23:42,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193507983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145030322] [2022-01-18 15:23:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:42,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:42,979 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) [2022-01-18 15:23:42,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:23:43,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:43,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:43,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:43,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:43,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:43,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:43,287 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:43,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:43,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:43,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145030322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:43,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:43,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:43,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650259766] [2022-01-18 15:23:43,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:43,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:43,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:43,292 INFO L87 Difference]: Start difference. First operand 486 states and 1464 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) [2022-01-18 15:23:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:43,516 INFO L93 Difference]: Finished difference Result 822 states and 2399 transitions. [2022-01-18 15:23:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:23:43,516 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 [2022-01-18 15:23:43,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:43,517 INFO L225 Difference]: With dead ends: 822 [2022-01-18 15:23:43,517 INFO L226 Difference]: Without dead ends: 822 [2022-01-18 15:23:43,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:23:43,517 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 187 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:43,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 203 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-18 15:23:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 467. [2022-01-18 15:23:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 15:23:43,524 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 15:23:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 15:23:43,524 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) [2022-01-18 15:23:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 15:23:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:43,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:43,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:43,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:43,742 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,SelfDestructingSolverStorable87 [2022-01-18 15:23:43,742 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1143347419, now seen corresponding path program 72 times [2022-01-18 15:23:43,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:43,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132445023] [2022-01-18 15:23:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:43,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:43,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132445023] [2022-01-18 15:23:43,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132445023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266594649] [2022-01-18 15:23:43,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:43,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:43,805 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) [2022-01-18 15:23:43,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:23:43,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:43,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:44,015 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 31 treesize of output 23 [2022-01-18 15:23:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:44,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:44,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:44,141 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 47 treesize of output 45 [2022-01-18 15:23:44,285 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:44,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:44,286 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 [2022-01-18 15:23:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:44,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266594649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:44,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:44,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:23:44,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905534553] [2022-01-18 15:23:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:44,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:44,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:44,290 INFO L87 Difference]: Start difference. First operand 467 states and 1402 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) [2022-01-18 15:23:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:44,551 INFO L93 Difference]: Finished difference Result 707 states and 2046 transitions. [2022-01-18 15:23:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:23:44,552 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 [2022-01-18 15:23:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:44,553 INFO L225 Difference]: With dead ends: 707 [2022-01-18 15:23:44,553 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 15:23:44,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:23:44,560 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 187 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 15:23:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 476. [2022-01-18 15:23:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0210526315789474) internal successors, (1435), 475 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1435 transitions. [2022-01-18 15:23:44,567 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1435 transitions. Word has length 22 [2022-01-18 15:23:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:44,567 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1435 transitions. [2022-01-18 15:23:44,567 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) [2022-01-18 15:23:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1435 transitions. [2022-01-18 15:23:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:44,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:44,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:44,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:44,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:44,783 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash 351255545, now seen corresponding path program 73 times [2022-01-18 15:23:44,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:44,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012415690] [2022-01-18 15:23:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:44,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:44,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:44,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012415690] [2022-01-18 15:23:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012415690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:44,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586806157] [2022-01-18 15:23:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:44,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:44,832 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) [2022-01-18 15:23:44,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:23:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:45,015 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 31 treesize of output 23 [2022-01-18 15:23:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:45,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:45,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:45,088 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 [2022-01-18 15:23:45,191 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:45,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:45,193 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 [2022-01-18 15:23:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:45,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586806157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:45,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:45,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:45,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527910822] [2022-01-18 15:23:45,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:45,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:45,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:45,196 INFO L87 Difference]: Start difference. First operand 476 states and 1435 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) [2022-01-18 15:23:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:45,455 INFO L93 Difference]: Finished difference Result 731 states and 2111 transitions. [2022-01-18 15:23:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:45,456 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 [2022-01-18 15:23:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:45,456 INFO L225 Difference]: With dead ends: 731 [2022-01-18 15:23:45,457 INFO L226 Difference]: Without dead ends: 721 [2022-01-18 15:23:45,457 INFO L932 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 [2022-01-18 15:23:45,457 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:45,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 220 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-18 15:23:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 473. [2022-01-18 15:23:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.014830508474576) internal successors, (1423), 472 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1423 transitions. [2022-01-18 15:23:45,464 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1423 transitions. Word has length 22 [2022-01-18 15:23:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:45,464 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1423 transitions. [2022-01-18 15:23:45,464 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) [2022-01-18 15:23:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1423 transitions. [2022-01-18 15:23:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:45,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:45,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:45,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:45,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:45,679 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash 776202755, now seen corresponding path program 74 times [2022-01-18 15:23:45,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681920365] [2022-01-18 15:23:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:45,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:45,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681920365] [2022-01-18 15:23:45,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681920365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048093015] [2022-01-18 15:23:45,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:45,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:45,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:45,747 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) [2022-01-18 15:23:45,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:23:45,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:45,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:46,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:46,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:46,077 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 [2022-01-18 15:23:46,167 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:46,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:46,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048093015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:46,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:46,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:46,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311759692] [2022-01-18 15:23:46,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:46,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:46,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:46,172 INFO L87 Difference]: Start difference. First operand 473 states and 1423 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) [2022-01-18 15:23:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:46,425 INFO L93 Difference]: Finished difference Result 694 states and 2019 transitions. [2022-01-18 15:23:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:46,425 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 [2022-01-18 15:23:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:46,426 INFO L225 Difference]: With dead ends: 694 [2022-01-18 15:23:46,426 INFO L226 Difference]: Without dead ends: 674 [2022-01-18 15:23:46,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:46,426 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:46,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 217 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-18 15:23:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 470. [2022-01-18 15:23:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.008528784648188) internal successors, (1411), 469 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) [2022-01-18 15:23:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1411 transitions. [2022-01-18 15:23:46,432 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1411 transitions. Word has length 22 [2022-01-18 15:23:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:46,432 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1411 transitions. [2022-01-18 15:23:46,432 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) [2022-01-18 15:23:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1411 transitions. [2022-01-18 15:23:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:46,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:46,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:46,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 15:23:46,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:46,648 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash 937124177, now seen corresponding path program 75 times [2022-01-18 15:23:46,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792545029] [2022-01-18 15:23:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:46,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:46,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792545029] [2022-01-18 15:23:46,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792545029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024842806] [2022-01-18 15:23:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:46,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:46,747 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) [2022-01-18 15:23:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:23:46,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:46,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:47,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:47,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:47,211 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:23:47,283 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:47,283 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 8 treesize of output 7 [2022-01-18 15:23:47,285 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 [2022-01-18 15:23:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:47,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024842806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:47,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:47,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:23:47,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500117820] [2022-01-18 15:23:47,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:47,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:47,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:47,290 INFO L87 Difference]: Start difference. First operand 470 states and 1411 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) [2022-01-18 15:23:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:47,673 INFO L93 Difference]: Finished difference Result 760 states and 2194 transitions. [2022-01-18 15:23:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:23:47,673 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 [2022-01-18 15:23:47,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:47,674 INFO L225 Difference]: With dead ends: 760 [2022-01-18 15:23:47,674 INFO L226 Difference]: Without dead ends: 760 [2022-01-18 15:23:47,674 INFO L932 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 [2022-01-18 15:23:47,674 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:47,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 207 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-18 15:23:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 482. [2022-01-18 15:23:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0395010395010393) internal successors, (1462), 481 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1462 transitions. [2022-01-18 15:23:47,681 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1462 transitions. Word has length 22 [2022-01-18 15:23:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:47,681 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1462 transitions. [2022-01-18 15:23:47,681 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) [2022-01-18 15:23:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1462 transitions. [2022-01-18 15:23:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:47,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:47,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:47,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:47,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:47,891 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:47,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1863240155, now seen corresponding path program 76 times [2022-01-18 15:23:47,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:47,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346402019] [2022-01-18 15:23:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:47,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:47,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:47,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346402019] [2022-01-18 15:23:47,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346402019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:47,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095187063] [2022-01-18 15:23:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:47,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:47,959 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) [2022-01-18 15:23:47,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:23:48,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:48,197 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 20 treesize of output 14 [2022-01-18 15:23:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:48,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:48,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:48,379 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 18 treesize of output 22 [2022-01-18 15:23:48,476 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:48,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:48,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:48,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095187063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:48,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:48,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:48,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429508937] [2022-01-18 15:23:48,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:48,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:48,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:48,483 INFO L87 Difference]: Start difference. First operand 482 states and 1462 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) [2022-01-18 15:23:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:48,756 INFO L93 Difference]: Finished difference Result 741 states and 2142 transitions. [2022-01-18 15:23:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:48,757 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 [2022-01-18 15:23:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:48,758 INFO L225 Difference]: With dead ends: 741 [2022-01-18 15:23:48,758 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 15:23:48,758 INFO L932 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 [2022-01-18 15:23:48,758 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:48,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 167 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 15:23:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 489. [2022-01-18 15:23:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0245901639344264) internal successors, (1476), 488 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1476 transitions. [2022-01-18 15:23:48,764 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1476 transitions. Word has length 22 [2022-01-18 15:23:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:48,764 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1476 transitions. [2022-01-18 15:23:48,764 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) [2022-01-18 15:23:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1476 transitions. [2022-01-18 15:23:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:48,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:48,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:48,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:48,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:48,975 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2112614821, now seen corresponding path program 77 times [2022-01-18 15:23:48,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:48,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35339985] [2022-01-18 15:23:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:48,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:49,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35339985] [2022-01-18 15:23:49,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35339985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66078090] [2022-01-18 15:23:49,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:49,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:49,056 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) [2022-01-18 15:23:49,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:23:49,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:49,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:49,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:49,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:49,407 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:49,408 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:23:49,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66078090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:49,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:49,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:23:49,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845749933] [2022-01-18 15:23:49,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:49,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:49,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:49,412 INFO L87 Difference]: Start difference. First operand 489 states and 1476 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) [2022-01-18 15:23:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:49,628 INFO L93 Difference]: Finished difference Result 666 states and 1943 transitions. [2022-01-18 15:23:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:49,628 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 [2022-01-18 15:23:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:49,629 INFO L225 Difference]: With dead ends: 666 [2022-01-18 15:23:49,629 INFO L226 Difference]: Without dead ends: 666 [2022-01-18 15:23:49,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:23:49,630 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:49,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 191 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-18 15:23:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 467. [2022-01-18 15:23:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 15:23:49,635 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 15:23:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:49,635 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 15:23:49,635 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) [2022-01-18 15:23:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 15:23:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:49,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:49,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:49,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:49,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:49,852 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash -359358453, now seen corresponding path program 78 times [2022-01-18 15:23:49,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:49,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755483480] [2022-01-18 15:23:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:49,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755483480] [2022-01-18 15:23:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755483480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:49,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145926613] [2022-01-18 15:23:49,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:49,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:49,937 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) [2022-01-18 15:23:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:23:50,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:50,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:50,171 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 31 treesize of output 23 [2022-01-18 15:23:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:50,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:50,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:50,329 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 47 treesize of output 45 [2022-01-18 15:23:50,443 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:50,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:50,445 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 [2022-01-18 15:23:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:50,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145926613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:50,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:50,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:23:50,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136141646] [2022-01-18 15:23:50,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:50,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:50,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:50,448 INFO L87 Difference]: Start difference. First operand 467 states and 1402 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) [2022-01-18 15:23:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:50,772 INFO L93 Difference]: Finished difference Result 836 states and 2421 transitions. [2022-01-18 15:23:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:50,772 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 [2022-01-18 15:23:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:50,773 INFO L225 Difference]: With dead ends: 836 [2022-01-18 15:23:50,773 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 15:23:50,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:23:50,773 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 179 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:50,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 267 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 15:23:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 485. [2022-01-18 15:23:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.0330578512396693) internal successors, (1468), 484 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1468 transitions. [2022-01-18 15:23:50,780 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1468 transitions. Word has length 22 [2022-01-18 15:23:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:50,780 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1468 transitions. [2022-01-18 15:23:50,780 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) [2022-01-18 15:23:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1468 transitions. [2022-01-18 15:23:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:50,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:50,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:50,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:50,991 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,SelfDestructingSolverStorable94 [2022-01-18 15:23:50,991 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1135244511, now seen corresponding path program 79 times [2022-01-18 15:23:50,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25466442] [2022-01-18 15:23:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:50,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:51,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25466442] [2022-01-18 15:23:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25466442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023261676] [2022-01-18 15:23:51,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:51,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:51,082 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) [2022-01-18 15:23:51,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:23:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:51,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:51,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:51,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:51,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:51,540 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:51,540 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 8 treesize of output 7 [2022-01-18 15:23:51,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:51,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023261676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:51,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:51,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:51,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552332373] [2022-01-18 15:23:51,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:51,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:51,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:51,545 INFO L87 Difference]: Start difference. First operand 485 states and 1468 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) [2022-01-18 15:23:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:51,981 INFO L93 Difference]: Finished difference Result 859 states and 2477 transitions. [2022-01-18 15:23:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:23:51,981 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 [2022-01-18 15:23:51,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:51,982 INFO L225 Difference]: With dead ends: 859 [2022-01-18 15:23:51,982 INFO L226 Difference]: Without dead ends: 849 [2022-01-18 15:23:51,982 INFO L932 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 [2022-01-18 15:23:51,982 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 234 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:51,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 251 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-18 15:23:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 482. [2022-01-18 15:23:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.027027027027027) internal successors, (1456), 481 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1456 transitions. [2022-01-18 15:23:51,989 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1456 transitions. Word has length 22 [2022-01-18 15:23:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:51,989 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1456 transitions. [2022-01-18 15:23:51,989 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) [2022-01-18 15:23:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1456 transitions. [2022-01-18 15:23:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:51,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:51,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:52,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:52,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:52,207 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1560191721, now seen corresponding path program 80 times [2022-01-18 15:23:52,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:52,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331167541] [2022-01-18 15:23:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:52,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:52,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331167541] [2022-01-18 15:23:52,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331167541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895588423] [2022-01-18 15:23:52,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:52,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:52,278 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) [2022-01-18 15:23:52,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:23:52,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:52,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:52,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:52,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:52,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:52,741 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:52,741 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 8 treesize of output 7 [2022-01-18 15:23:52,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895588423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:52,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763888769] [2022-01-18 15:23:52,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:52,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:52,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:52,746 INFO L87 Difference]: Start difference. First operand 482 states and 1456 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) [2022-01-18 15:23:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:53,037 INFO L93 Difference]: Finished difference Result 853 states and 2477 transitions. [2022-01-18 15:23:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:23:53,037 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 [2022-01-18 15:23:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:53,038 INFO L225 Difference]: With dead ends: 853 [2022-01-18 15:23:53,038 INFO L226 Difference]: Without dead ends: 833 [2022-01-18 15:23:53,038 INFO L932 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 [2022-01-18 15:23:53,039 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 198 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:53,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 224 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-18 15:23:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 479. [2022-01-18 15:23:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0209205020920504) internal successors, (1444), 478 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1444 transitions. [2022-01-18 15:23:53,045 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1444 transitions. Word has length 22 [2022-01-18 15:23:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:53,045 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1444 transitions. [2022-01-18 15:23:53,045 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) [2022-01-18 15:23:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1444 transitions. [2022-01-18 15:23:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:53,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:53,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:53,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:53,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:53,260 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -963179015, now seen corresponding path program 81 times [2022-01-18 15:23:53,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:53,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264512078] [2022-01-18 15:23:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:53,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:53,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:53,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264512078] [2022-01-18 15:23:53,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264512078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:53,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302763560] [2022-01-18 15:23:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:53,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:53,315 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) [2022-01-18 15:23:53,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:23:53,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:53,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:53,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:53,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:53,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:53,558 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 47 treesize of output 45 [2022-01-18 15:23:53,692 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:53,693 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 [2022-01-18 15:23:53,695 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 [2022-01-18 15:23:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:53,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302763560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:53,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:53,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:53,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007820013] [2022-01-18 15:23:53,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:53,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:53,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:53,700 INFO L87 Difference]: Start difference. First operand 479 states and 1444 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) [2022-01-18 15:23:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:54,029 INFO L93 Difference]: Finished difference Result 788 states and 2279 transitions. [2022-01-18 15:23:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:54,029 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 [2022-01-18 15:23:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:54,030 INFO L225 Difference]: With dead ends: 788 [2022-01-18 15:23:54,030 INFO L226 Difference]: Without dead ends: 752 [2022-01-18 15:23:54,031 INFO L932 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 [2022-01-18 15:23:54,031 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 197 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:54,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 224 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-18 15:23:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 473. [2022-01-18 15:23:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.0084745762711864) internal successors, (1420), 472 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1420 transitions. [2022-01-18 15:23:54,037 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1420 transitions. Word has length 22 [2022-01-18 15:23:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:54,037 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1420 transitions. [2022-01-18 15:23:54,037 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) [2022-01-18 15:23:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1420 transitions. [2022-01-18 15:23:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:54,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:54,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:54,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:54,253 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,SelfDestructingSolverStorable97 [2022-01-18 15:23:54,254 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:54,254 INFO L85 PathProgramCache]: Analyzing trace with hash 978208761, now seen corresponding path program 82 times [2022-01-18 15:23:54,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:54,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703639659] [2022-01-18 15:23:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:54,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:54,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703639659] [2022-01-18 15:23:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703639659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87495024] [2022-01-18 15:23:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:54,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:54,302 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) [2022-01-18 15:23:54,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:23:54,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:54,550 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 23 [2022-01-18 15:23:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:54,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:54,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:54,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:54,754 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:54,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:54,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:54,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87495024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:54,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:54,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:23:54,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248832930] [2022-01-18 15:23:54,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:54,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:54,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:54,759 INFO L87 Difference]: Start difference. First operand 473 states and 1420 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) [2022-01-18 15:23:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:54,931 INFO L93 Difference]: Finished difference Result 725 states and 2103 transitions. [2022-01-18 15:23:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:54,932 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 [2022-01-18 15:23:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:54,933 INFO L225 Difference]: With dead ends: 725 [2022-01-18 15:23:54,933 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 15:23:54,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:54,933 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:54,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 158 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 15:23:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 482. [2022-01-18 15:23:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0207900207900207) internal successors, (1453), 481 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1453 transitions. [2022-01-18 15:23:54,941 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1453 transitions. Word has length 22 [2022-01-18 15:23:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:54,942 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1453 transitions. [2022-01-18 15:23:54,942 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) [2022-01-18 15:23:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1453 transitions. [2022-01-18 15:23:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:54,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:54,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:54,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:55,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:55,158 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1822155571, now seen corresponding path program 83 times [2022-01-18 15:23:55,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176732372] [2022-01-18 15:23:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:55,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:55,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:55,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176732372] [2022-01-18 15:23:55,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176732372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:55,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492612077] [2022-01-18 15:23:55,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:55,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:55,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:55,271 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) [2022-01-18 15:23:55,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:23:55,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:55,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:55,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:23:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:55,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:55,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:55,650 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 42 treesize of output 40 [2022-01-18 15:23:55,780 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:55,780 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 8 treesize of output 7 [2022-01-18 15:23:55,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:55,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492612077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:55,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:55,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414792890] [2022-01-18 15:23:55,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:55,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:55,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:55,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:55,787 INFO L87 Difference]: Start difference. First operand 482 states and 1453 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) [2022-01-18 15:23:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:56,205 INFO L93 Difference]: Finished difference Result 752 states and 2177 transitions. [2022-01-18 15:23:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:56,206 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 [2022-01-18 15:23:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:56,206 INFO L225 Difference]: With dead ends: 752 [2022-01-18 15:23:56,207 INFO L226 Difference]: Without dead ends: 742 [2022-01-18 15:23:56,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:23:56,207 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:56,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 196 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-18 15:23:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 479. [2022-01-18 15:23:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.014644351464435) internal successors, (1441), 478 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1441 transitions. [2022-01-18 15:23:56,213 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1441 transitions. Word has length 22 [2022-01-18 15:23:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:56,213 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1441 transitions. [2022-01-18 15:23:56,213 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) [2022-01-18 15:23:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1441 transitions. [2022-01-18 15:23:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:56,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:56,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:56,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:56,423 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1397208361, now seen corresponding path program 84 times [2022-01-18 15:23:56,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705288999] [2022-01-18 15:23:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:56,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:56,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705288999] [2022-01-18 15:23:56,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705288999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:56,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655045817] [2022-01-18 15:23:56,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:56,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:56,470 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) [2022-01-18 15:23:56,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:23:56,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:23:56,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:56,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:56,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:56,730 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 [2022-01-18 15:23:56,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:56,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:56,814 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 [2022-01-18 15:23:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:56,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655045817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:56,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:56,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:56,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187716328] [2022-01-18 15:23:56,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:56,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:56,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:56,817 INFO L87 Difference]: Start difference. First operand 479 states and 1441 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) [2022-01-18 15:23:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:57,030 INFO L93 Difference]: Finished difference Result 706 states and 2058 transitions. [2022-01-18 15:23:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:57,031 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 [2022-01-18 15:23:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:57,031 INFO L225 Difference]: With dead ends: 706 [2022-01-18 15:23:57,031 INFO L226 Difference]: Without dead ends: 686 [2022-01-18 15:23:57,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:57,032 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:57,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 184 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-18 15:23:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 476. [2022-01-18 15:23:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.008421052631579) internal successors, (1429), 475 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1429 transitions. [2022-01-18 15:23:57,037 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1429 transitions. Word has length 22 [2022-01-18 15:23:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1429 transitions. [2022-01-18 15:23:57,038 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) [2022-01-18 15:23:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1429 transitions. [2022-01-18 15:23:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:57,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:57,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:57,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:57,253 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,SelfDestructingSolverStorable100 [2022-01-18 15:23:57,254 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1236286939, now seen corresponding path program 85 times [2022-01-18 15:23:57,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:57,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34762538] [2022-01-18 15:23:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:57,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:57,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34762538] [2022-01-18 15:23:57,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34762538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920648628] [2022-01-18 15:23:57,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:57,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:57,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:57,334 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) [2022-01-18 15:23:57,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:23:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:57,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:57,582 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 20 treesize of output 14 [2022-01-18 15:23:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:57,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:57,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:57,776 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 18 treesize of output 22 [2022-01-18 15:23:57,863 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:57,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:57,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920648628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:57,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:57,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:23:57,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734187391] [2022-01-18 15:23:57,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:57,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:23:57,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:23:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:57,870 INFO L87 Difference]: Start difference. First operand 476 states and 1429 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) [2022-01-18 15:23:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:58,152 INFO L93 Difference]: Finished difference Result 766 states and 2218 transitions. [2022-01-18 15:23:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:23:58,153 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 [2022-01-18 15:23:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:58,154 INFO L225 Difference]: With dead ends: 766 [2022-01-18 15:23:58,154 INFO L226 Difference]: Without dead ends: 766 [2022-01-18 15:23:58,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:23:58,154 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:58,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 157 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-01-18 15:23:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 488. [2022-01-18 15:23:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0328542094455853) internal successors, (1477), 487 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1477 transitions. [2022-01-18 15:23:58,160 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1477 transitions. Word has length 22 [2022-01-18 15:23:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:58,160 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1477 transitions. [2022-01-18 15:23:58,160 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) [2022-01-18 15:23:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1477 transitions. [2022-01-18 15:23:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:58,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:58,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:58,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:58,371 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,SelfDestructingSolverStorable101 [2022-01-18 15:23:58,371 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 258316025, now seen corresponding path program 86 times [2022-01-18 15:23:58,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241775666] [2022-01-18 15:23:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:58,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:58,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:58,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241775666] [2022-01-18 15:23:58,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241775666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:58,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935258783] [2022-01-18 15:23:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:58,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:58,437 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) [2022-01-18 15:23:58,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:23:58,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:58,677 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 20 treesize of output 14 [2022-01-18 15:23:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:58,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:58,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:58,827 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 18 treesize of output 22 [2022-01-18 15:23:58,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:58,911 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 8 treesize of output 7 [2022-01-18 15:23:58,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:23:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:58,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935258783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:58,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:58,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:58,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053857266] [2022-01-18 15:23:58,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:58,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:58,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:58,917 INFO L87 Difference]: Start difference. First operand 488 states and 1477 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) [2022-01-18 15:23:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:59,244 INFO L93 Difference]: Finished difference Result 750 states and 2175 transitions. [2022-01-18 15:23:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:59,245 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 [2022-01-18 15:23:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:59,245 INFO L225 Difference]: With dead ends: 750 [2022-01-18 15:23:59,245 INFO L226 Difference]: Without dead ends: 740 [2022-01-18 15:23:59,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:59,246 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:59,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 197 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:23:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-18 15:23:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 495. [2022-01-18 15:23:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.0182186234817814) internal successors, (1491), 494 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1491 transitions. [2022-01-18 15:23:59,252 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1491 transitions. Word has length 22 [2022-01-18 15:23:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:59,252 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1491 transitions. [2022-01-18 15:23:59,252 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) [2022-01-18 15:23:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1491 transitions. [2022-01-18 15:23:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:23:59,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:59,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:59,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:59,479 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash -60796295, now seen corresponding path program 87 times [2022-01-18 15:23:59,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602842381] [2022-01-18 15:23:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:59,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:59,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602842381] [2022-01-18 15:23:59,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602842381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141119155] [2022-01-18 15:23:59,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:59,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:59,567 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) [2022-01-18 15:23:59,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:23:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:23:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:59,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:59,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:59,896 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 18 treesize of output 22 [2022-01-18 15:23:59,960 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:23:59,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:23:59,962 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 [2022-01-18 15:23:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:59,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141119155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:59,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:59,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:23:59,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590292685] [2022-01-18 15:23:59,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:59,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:59,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:59,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:59,965 INFO L87 Difference]: Start difference. First operand 495 states and 1491 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) [2022-01-18 15:24:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:00,201 INFO L93 Difference]: Finished difference Result 678 states and 1982 transitions. [2022-01-18 15:24:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:00,201 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 [2022-01-18 15:24:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:00,202 INFO L225 Difference]: With dead ends: 678 [2022-01-18 15:24:00,202 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 15:24:00,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:00,203 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 129 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:00,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 152 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 15:24:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 467. [2022-01-18 15:24:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 15:24:00,209 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 15:24:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:00,209 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 15:24:00,209 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) [2022-01-18 15:24:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 15:24:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:00,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:00,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:00,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:00,410 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,SelfDestructingSolverStorable103 [2022-01-18 15:24:00,410 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:00,410 INFO L85 PathProgramCache]: Analyzing trace with hash -888840437, now seen corresponding path program 88 times [2022-01-18 15:24:00,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:00,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191482295] [2022-01-18 15:24:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:00,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:00,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191482295] [2022-01-18 15:24:00,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191482295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9172764] [2022-01-18 15:24:00,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:00,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:00,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:00,487 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) [2022-01-18 15:24:00,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:24:00,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:00,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:00,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:00,877 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 13 treesize of output 17 [2022-01-18 15:24:00,945 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:00,945 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:24:00,947 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 [2022-01-18 15:24:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:00,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9172764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:00,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:00,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:00,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018039833] [2022-01-18 15:24:00,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:00,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:00,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:00,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:00,953 INFO L87 Difference]: Start difference. First operand 467 states and 1402 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) [2022-01-18 15:24:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:01,412 INFO L93 Difference]: Finished difference Result 850 states and 2502 transitions. [2022-01-18 15:24:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:01,412 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 [2022-01-18 15:24:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:01,413 INFO L225 Difference]: With dead ends: 850 [2022-01-18 15:24:01,413 INFO L226 Difference]: Without dead ends: 850 [2022-01-18 15:24:01,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:01,414 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 136 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:01,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:01,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-18 15:24:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 474. [2022-01-18 15:24:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.0084566596194504) internal successors, (1423), 473 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1423 transitions. [2022-01-18 15:24:01,420 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1423 transitions. Word has length 22 [2022-01-18 15:24:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:01,421 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1423 transitions. [2022-01-18 15:24:01,421 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) [2022-01-18 15:24:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1423 transitions. [2022-01-18 15:24:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:01,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:01,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:01,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:01,638 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,SelfDestructingSolverStorable104 [2022-01-18 15:24:01,638 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1170681265, now seen corresponding path program 89 times [2022-01-18 15:24:01,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:01,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932292047] [2022-01-18 15:24:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:01,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:01,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932292047] [2022-01-18 15:24:01,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932292047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26414208] [2022-01-18 15:24:01,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:01,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:01,723 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) [2022-01-18 15:24:01,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:24:01,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:01,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:02,004 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 20 treesize of output 14 [2022-01-18 15:24:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:02,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:02,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:02,243 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 13 treesize of output 17 [2022-01-18 15:24:02,317 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:02,317 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:24:02,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:02,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26414208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:02,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:02,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:02,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995918273] [2022-01-18 15:24:02,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:02,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:02,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:02,324 INFO L87 Difference]: Start difference. First operand 474 states and 1423 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) [2022-01-18 15:24:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:02,763 INFO L93 Difference]: Finished difference Result 912 states and 2684 transitions. [2022-01-18 15:24:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:24:02,763 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 [2022-01-18 15:24:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:02,764 INFO L225 Difference]: With dead ends: 912 [2022-01-18 15:24:02,764 INFO L226 Difference]: Without dead ends: 912 [2022-01-18 15:24:02,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:02,765 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 199 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:02,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 215 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-18 15:24:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 486. [2022-01-18 15:24:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0329896907216494) internal successors, (1471), 485 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1471 transitions. [2022-01-18 15:24:02,771 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1471 transitions. Word has length 22 [2022-01-18 15:24:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:02,771 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1471 transitions. [2022-01-18 15:24:02,771 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) [2022-01-18 15:24:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1471 transitions. [2022-01-18 15:24:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:02,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:02,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:02,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 15:24:02,972 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,SelfDestructingSolverStorable105 [2022-01-18 15:24:02,972 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1629683067, now seen corresponding path program 90 times [2022-01-18 15:24:02,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:02,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670104221] [2022-01-18 15:24:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:02,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:03,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670104221] [2022-01-18 15:24:03,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670104221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:03,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840066644] [2022-01-18 15:24:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:03,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:03,069 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) [2022-01-18 15:24:03,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:24:03,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:03,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:03,279 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 20 treesize of output 14 [2022-01-18 15:24:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:03,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:03,385 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:24:03,426 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:03,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:03,428 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 [2022-01-18 15:24:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840066644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:03,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:03,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:24:03,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752410813] [2022-01-18 15:24:03,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:03,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:03,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:03,431 INFO L87 Difference]: Start difference. First operand 486 states and 1471 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) [2022-01-18 15:24:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:03,663 INFO L93 Difference]: Finished difference Result 882 states and 2603 transitions. [2022-01-18 15:24:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:03,663 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 [2022-01-18 15:24:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:03,664 INFO L225 Difference]: With dead ends: 882 [2022-01-18 15:24:03,665 INFO L226 Difference]: Without dead ends: 872 [2022-01-18 15:24:03,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:03,665 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:03,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 200 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-18 15:24:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 493. [2022-01-18 15:24:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.018292682926829) internal successors, (1485), 492 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1485 transitions. [2022-01-18 15:24:03,671 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1485 transitions. Word has length 22 [2022-01-18 15:24:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:03,671 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1485 transitions. [2022-01-18 15:24:03,672 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) [2022-01-18 15:24:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1485 transitions. [2022-01-18 15:24:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:03,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:03,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:03,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 15:24:03,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:03,875 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1948795387, now seen corresponding path program 91 times [2022-01-18 15:24:03,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79059305] [2022-01-18 15:24:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:03,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79059305] [2022-01-18 15:24:03,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79059305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298184780] [2022-01-18 15:24:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:03,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:03,960 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) [2022-01-18 15:24:03,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:24:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:04,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:04,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:04,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:04,297 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:04,297 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 8 treesize of output 7 [2022-01-18 15:24:04,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:04,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298184780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:04,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:04,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:04,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252313747] [2022-01-18 15:24:04,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:04,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:04,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:04,301 INFO L87 Difference]: Start difference. First operand 493 states and 1485 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) [2022-01-18 15:24:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:04,623 INFO L93 Difference]: Finished difference Result 821 states and 2439 transitions. [2022-01-18 15:24:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:04,623 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 [2022-01-18 15:24:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:04,624 INFO L225 Difference]: With dead ends: 821 [2022-01-18 15:24:04,624 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 15:24:04,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:04,625 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:04,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 337 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 15:24:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 471. [2022-01-18 15:24:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.008510638297872) internal successors, (1414), 470 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1414 transitions. [2022-01-18 15:24:04,631 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1414 transitions. Word has length 22 [2022-01-18 15:24:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:04,631 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1414 transitions. [2022-01-18 15:24:04,631 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) [2022-01-18 15:24:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1414 transitions. [2022-01-18 15:24:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:04,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:04,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:04,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:04,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:04,848 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash 287556811, now seen corresponding path program 92 times [2022-01-18 15:24:04,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:04,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153885828] [2022-01-18 15:24:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:04,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:04,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:04,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153885828] [2022-01-18 15:24:04,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153885828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:04,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805375764] [2022-01-18 15:24:04,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:04,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:04,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:04,896 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) [2022-01-18 15:24:04,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:24:05,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:05,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:05,142 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 31 treesize of output 23 [2022-01-18 15:24:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:05,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:05,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:05,289 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:24:05,463 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:05,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:05,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:05,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805375764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:05,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:05,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:05,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151233125] [2022-01-18 15:24:05,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:05,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:05,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:05,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:05,470 INFO L87 Difference]: Start difference. First operand 471 states and 1414 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) [2022-01-18 15:24:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:05,896 INFO L93 Difference]: Finished difference Result 697 states and 2056 transitions. [2022-01-18 15:24:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:24:05,897 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 [2022-01-18 15:24:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:05,898 INFO L225 Difference]: With dead ends: 697 [2022-01-18 15:24:05,898 INFO L226 Difference]: Without dead ends: 697 [2022-01-18 15:24:05,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:05,898 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 133 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:05,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 233 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-01-18 15:24:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 480. [2022-01-18 15:24:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.020876826722338) internal successors, (1447), 479 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1447 transitions. [2022-01-18 15:24:05,904 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1447 transitions. Word has length 22 [2022-01-18 15:24:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:05,904 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1447 transitions. [2022-01-18 15:24:05,904 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) [2022-01-18 15:24:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1447 transitions. [2022-01-18 15:24:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:05,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:05,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:05,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:06,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:06,120 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1782159775, now seen corresponding path program 93 times [2022-01-18 15:24:06,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:06,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914990892] [2022-01-18 15:24:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:06,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:06,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914990892] [2022-01-18 15:24:06,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914990892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218089505] [2022-01-18 15:24:06,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:06,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:06,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:06,198 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) [2022-01-18 15:24:06,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:24:06,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:06,471 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 31 treesize of output 23 [2022-01-18 15:24:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:06,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:06,584 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:24:06,757 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:06,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:06,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:06,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218089505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:06,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:06,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:06,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061156870] [2022-01-18 15:24:06,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:06,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:06,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:06,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:06,763 INFO L87 Difference]: Start difference. First operand 480 states and 1447 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) [2022-01-18 15:24:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:07,026 INFO L93 Difference]: Finished difference Result 719 states and 2116 transitions. [2022-01-18 15:24:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:07,026 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 [2022-01-18 15:24:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:07,027 INFO L225 Difference]: With dead ends: 719 [2022-01-18 15:24:07,027 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 15:24:07,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:07,027 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 162 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:07,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 167 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 15:24:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 477. [2022-01-18 15:24:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.014705882352941) internal successors, (1435), 476 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1435 transitions. [2022-01-18 15:24:07,033 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1435 transitions. Word has length 22 [2022-01-18 15:24:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:07,033 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1435 transitions. [2022-01-18 15:24:07,033 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) [2022-01-18 15:24:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1435 transitions. [2022-01-18 15:24:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:07,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:07,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:07,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:07,247 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,SelfDestructingSolverStorable109 [2022-01-18 15:24:07,247 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2087860311, now seen corresponding path program 94 times [2022-01-18 15:24:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169207775] [2022-01-18 15:24:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:07,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:07,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169207775] [2022-01-18 15:24:07,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169207775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621342146] [2022-01-18 15:24:07,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:07,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:07,310 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) [2022-01-18 15:24:07,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:24:07,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:07,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:07,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:07,771 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:07,772 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 8 treesize of output 7 [2022-01-18 15:24:07,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621342146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:07,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:07,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:07,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776224646] [2022-01-18 15:24:07,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:07,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:07,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:07,778 INFO L87 Difference]: Start difference. First operand 477 states and 1435 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) [2022-01-18 15:24:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:08,179 INFO L93 Difference]: Finished difference Result 682 states and 2027 transitions. [2022-01-18 15:24:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:08,180 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 [2022-01-18 15:24:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:08,181 INFO L225 Difference]: With dead ends: 682 [2022-01-18 15:24:08,181 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:24:08,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:08,181 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:08,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 253 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:24:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 474. [2022-01-18 15:24:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.0084566596194504) internal successors, (1423), 473 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1423 transitions. [2022-01-18 15:24:08,187 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1423 transitions. Word has length 22 [2022-01-18 15:24:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:08,187 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1423 transitions. [2022-01-18 15:24:08,187 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) [2022-01-18 15:24:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1423 transitions. [2022-01-18 15:24:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:08,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:08,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:08,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:08,398 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,SelfDestructingSolverStorable110 [2022-01-18 15:24:08,398 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1926938889, now seen corresponding path program 95 times [2022-01-18 15:24:08,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:08,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097828525] [2022-01-18 15:24:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:08,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:08,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:08,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097828525] [2022-01-18 15:24:08,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097828525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:08,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868437121] [2022-01-18 15:24:08,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:08,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:08,487 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) [2022-01-18 15:24:08,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:24:08,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:08,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:08,742 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 20 treesize of output 14 [2022-01-18 15:24:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:08,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:08,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:08,895 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 16 treesize of output 20 [2022-01-18 15:24:08,977 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:08,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:08,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:08,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868437121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:08,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:08,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:08,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427039434] [2022-01-18 15:24:08,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:08,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:08,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:08,984 INFO L87 Difference]: Start difference. First operand 474 states and 1423 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) [2022-01-18 15:24:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:09,418 INFO L93 Difference]: Finished difference Result 768 states and 2261 transitions. [2022-01-18 15:24:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:09,418 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 [2022-01-18 15:24:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:09,419 INFO L225 Difference]: With dead ends: 768 [2022-01-18 15:24:09,419 INFO L226 Difference]: Without dead ends: 768 [2022-01-18 15:24:09,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:09,420 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:09,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 244 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-18 15:24:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 486. [2022-01-18 15:24:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0391752577319586) internal successors, (1474), 485 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1474 transitions. [2022-01-18 15:24:09,426 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1474 transitions. Word has length 22 [2022-01-18 15:24:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:09,426 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1474 transitions. [2022-01-18 15:24:09,426 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) [2022-01-18 15:24:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1474 transitions. [2022-01-18 15:24:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:09,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:09,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:09,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:09,627 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,SelfDestructingSolverStorable111 [2022-01-18 15:24:09,627 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:09,627 INFO L85 PathProgramCache]: Analyzing trace with hash -432335925, now seen corresponding path program 96 times [2022-01-18 15:24:09,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500438002] [2022-01-18 15:24:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:09,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:09,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500438002] [2022-01-18 15:24:09,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500438002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503141414] [2022-01-18 15:24:09,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:09,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:09,712 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) [2022-01-18 15:24:09,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:24:09,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:09,957 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 20 treesize of output 14 [2022-01-18 15:24:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:09,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:10,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:10,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:10,194 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:10,194 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 [2022-01-18 15:24:10,196 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 [2022-01-18 15:24:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:10,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503141414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:10,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:10,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:10,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643022884] [2022-01-18 15:24:10,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:10,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:10,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:10,200 INFO L87 Difference]: Start difference. First operand 486 states and 1474 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) [2022-01-18 15:24:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:10,446 INFO L93 Difference]: Finished difference Result 735 states and 2168 transitions. [2022-01-18 15:24:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:10,447 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 [2022-01-18 15:24:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:10,448 INFO L225 Difference]: With dead ends: 735 [2022-01-18 15:24:10,448 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 15:24:10,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:10,448 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:10,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 225 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 15:24:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 493. [2022-01-18 15:24:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.024390243902439) internal successors, (1488), 492 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1488 transitions. [2022-01-18 15:24:10,454 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1488 transitions. Word has length 22 [2022-01-18 15:24:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:10,471 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1488 transitions. [2022-01-18 15:24:10,471 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) [2022-01-18 15:24:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1488 transitions. [2022-01-18 15:24:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:10,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:10,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:10,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:10,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:10,672 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash -751448245, now seen corresponding path program 97 times [2022-01-18 15:24:10,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:10,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85697524] [2022-01-18 15:24:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:10,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:10,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85697524] [2022-01-18 15:24:10,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85697524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988381189] [2022-01-18 15:24:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:10,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:10,724 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) [2022-01-18 15:24:10,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:24:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:10,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:11,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:11,084 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 18 treesize of output 22 [2022-01-18 15:24:11,171 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:11,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:11,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:11,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988381189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:11,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:11,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:11,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501090246] [2022-01-18 15:24:11,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:11,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:11,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:11,177 INFO L87 Difference]: Start difference. First operand 493 states and 1488 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) [2022-01-18 15:24:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:11,393 INFO L93 Difference]: Finished difference Result 662 states and 1974 transitions. [2022-01-18 15:24:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:11,393 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 [2022-01-18 15:24:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:11,394 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:24:11,394 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:24:11,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:11,394 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:11,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 208 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:24:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 468. [2022-01-18 15:24:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.0085653104925054) internal successors, (1405), 467 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1405 transitions. [2022-01-18 15:24:11,403 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1405 transitions. Word has length 22 [2022-01-18 15:24:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1405 transitions. [2022-01-18 15:24:11,403 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) [2022-01-18 15:24:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1405 transitions. [2022-01-18 15:24:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:11,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:11,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:11,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:11,619 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,SelfDestructingSolverStorable113 [2022-01-18 15:24:11,619 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -385697089, now seen corresponding path program 98 times [2022-01-18 15:24:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427681499] [2022-01-18 15:24:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:11,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:11,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427681499] [2022-01-18 15:24:11,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427681499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501196242] [2022-01-18 15:24:11,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:11,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:11,690 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) [2022-01-18 15:24:11,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:24:11,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:11,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:11,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:11,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:12,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:12,141 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 13 treesize of output 17 [2022-01-18 15:24:12,183 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:12,183 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 [2022-01-18 15:24:12,185 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 [2022-01-18 15:24:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:12,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501196242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:12,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:12,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:24:12,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970106837] [2022-01-18 15:24:12,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:12,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:24:12,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:24:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:24:12,190 INFO L87 Difference]: Start difference. First operand 468 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2022-01-18 15:24:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:12,613 INFO L93 Difference]: Finished difference Result 1068 states and 3171 transitions. [2022-01-18 15:24:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 [2022-01-18 15:24:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:12,615 INFO L225 Difference]: With dead ends: 1068 [2022-01-18 15:24:12,615 INFO L226 Difference]: Without dead ends: 1068 [2022-01-18 15:24:12,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:12,615 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 187 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:12,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 198 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-18 15:24:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 476. [2022-01-18 15:24:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0168421052631578) internal successors, (1433), 475 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1433 transitions. [2022-01-18 15:24:12,622 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1433 transitions. Word has length 22 [2022-01-18 15:24:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:12,622 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1433 transitions. [2022-01-18 15:24:12,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2022-01-18 15:24:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1433 transitions. [2022-01-18 15:24:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:12,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:12,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:12,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:12,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 15:24:12,827 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1673824613, now seen corresponding path program 99 times [2022-01-18 15:24:12,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:12,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780164354] [2022-01-18 15:24:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:12,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:12,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780164354] [2022-01-18 15:24:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780164354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54543354] [2022-01-18 15:24:12,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:12,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:12,912 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) [2022-01-18 15:24:12,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:24:13,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:13,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:24:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:13,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:13,139 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 24 treesize of output 18 [2022-01-18 15:24:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:24:13,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:13,475 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 319 treesize of output 275 [2022-01-18 15:24:13,713 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:13,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:13,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:24:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:24:13,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54543354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:13,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:13,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-01-18 15:24:13,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653163440] [2022-01-18 15:24:13,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:13,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:24:13,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:24:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:24:13,720 INFO L87 Difference]: Start difference. First operand 476 states and 1433 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2022-01-18 15:24:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:14,546 INFO L93 Difference]: Finished difference Result 1327 states and 3864 transitions. [2022-01-18 15:24:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:24:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 [2022-01-18 15:24:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:14,547 INFO L225 Difference]: With dead ends: 1327 [2022-01-18 15:24:14,547 INFO L226 Difference]: Without dead ends: 1204 [2022-01-18 15:24:14,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:24:14,548 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 198 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:14,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 341 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:24:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-01-18 15:24:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 452. [2022-01-18 15:24:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.008869179600887) internal successors, (1357), 451 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1357 transitions. [2022-01-18 15:24:14,555 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1357 transitions. Word has length 22 [2022-01-18 15:24:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:14,555 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1357 transitions. [2022-01-18 15:24:14,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2022-01-18 15:24:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1357 transitions. [2022-01-18 15:24:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:14,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:14,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:14,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:14,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:14,756 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2067370929, now seen corresponding path program 100 times [2022-01-18 15:24:14,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:14,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541781094] [2022-01-18 15:24:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:14,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:14,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:14,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541781094] [2022-01-18 15:24:14,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541781094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:14,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266543173] [2022-01-18 15:24:14,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:14,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:14,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:14,849 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) [2022-01-18 15:24:14,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:24:14,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:15,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:15,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:15,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:15,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:15,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:15,306 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:15,306 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 8 treesize of output 7 [2022-01-18 15:24:15,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:15,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266543173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:15,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:15,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:24:15,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245986954] [2022-01-18 15:24:15,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:15,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:15,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:15,311 INFO L87 Difference]: Start difference. First operand 452 states and 1357 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) [2022-01-18 15:24:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:15,699 INFO L93 Difference]: Finished difference Result 995 states and 2877 transitions. [2022-01-18 15:24:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:24:15,700 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 [2022-01-18 15:24:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:15,701 INFO L225 Difference]: With dead ends: 995 [2022-01-18 15:24:15,701 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 15:24:15,701 INFO L932 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 [2022-01-18 15:24:15,701 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 264 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:15,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 249 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 15:24:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 457. [2022-01-18 15:24:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.008771929824561) internal successors, (1372), 456 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1372 transitions. [2022-01-18 15:24:15,707 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1372 transitions. Word has length 22 [2022-01-18 15:24:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1372 transitions. [2022-01-18 15:24:15,708 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) [2022-01-18 15:24:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1372 transitions. [2022-01-18 15:24:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:15,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:15,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:15,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:15,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:15,914 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1697886599, now seen corresponding path program 101 times [2022-01-18 15:24:15,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297546450] [2022-01-18 15:24:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:15,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:16,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297546450] [2022-01-18 15:24:16,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297546450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733401915] [2022-01-18 15:24:16,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:16,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:16,026 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) [2022-01-18 15:24:16,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:24:16,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:16,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:16,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:16,266 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 20 treesize of output 14 [2022-01-18 15:24:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:16,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:16,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:16,377 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 13 treesize of output 17 [2022-01-18 15:24:16,401 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:16,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:16,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:16,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733401915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:16,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:16,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:16,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604505195] [2022-01-18 15:24:16,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:16,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:16,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:16,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:16,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:16,415 INFO L87 Difference]: Start difference. First operand 457 states and 1372 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) [2022-01-18 15:24:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:16,858 INFO L93 Difference]: Finished difference Result 916 states and 2676 transitions. [2022-01-18 15:24:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:16,858 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 [2022-01-18 15:24:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:16,859 INFO L225 Difference]: With dead ends: 916 [2022-01-18 15:24:16,859 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 15:24:16,859 INFO L932 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 [2022-01-18 15:24:16,859 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 192 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:16,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 219 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 15:24:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 475. [2022-01-18 15:24:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.021097046413502) internal successors, (1432), 474 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1432 transitions. [2022-01-18 15:24:16,866 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1432 transitions. Word has length 22 [2022-01-18 15:24:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:16,866 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1432 transitions. [2022-01-18 15:24:16,866 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) [2022-01-18 15:24:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1432 transitions. [2022-01-18 15:24:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:16,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:16,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:16,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 15:24:17,078 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,SelfDestructingSolverStorable117 [2022-01-18 15:24:17,078 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1479625607, now seen corresponding path program 102 times [2022-01-18 15:24:17,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746475880] [2022-01-18 15:24:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:17,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:17,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746475880] [2022-01-18 15:24:17,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746475880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612659712] [2022-01-18 15:24:17,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:17,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:17,185 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) [2022-01-18 15:24:17,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:24:17,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:17,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:17,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:17,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:17,659 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 13 treesize of output 17 [2022-01-18 15:24:17,688 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:17,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:17,689 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 [2022-01-18 15:24:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:17,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612659712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:17,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:17,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:24:17,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156867583] [2022-01-18 15:24:17,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:17,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:17,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:17,693 INFO L87 Difference]: Start difference. First operand 475 states and 1432 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) [2022-01-18 15:24:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:17,994 INFO L93 Difference]: Finished difference Result 833 states and 2457 transitions. [2022-01-18 15:24:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:17,994 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 [2022-01-18 15:24:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:17,995 INFO L225 Difference]: With dead ends: 833 [2022-01-18 15:24:17,995 INFO L226 Difference]: Without dead ends: 833 [2022-01-18 15:24:17,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:17,995 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:17,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 174 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-18 15:24:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 457. [2022-01-18 15:24:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.008771929824561) internal successors, (1372), 456 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1372 transitions. [2022-01-18 15:24:18,001 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1372 transitions. Word has length 22 [2022-01-18 15:24:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:18,001 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1372 transitions. [2022-01-18 15:24:18,001 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) [2022-01-18 15:24:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1372 transitions. [2022-01-18 15:24:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:18,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:18,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:18,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:18,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:18,206 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -553534529, now seen corresponding path program 103 times [2022-01-18 15:24:18,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470445622] [2022-01-18 15:24:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:18,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:18,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470445622] [2022-01-18 15:24:18,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470445622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919509878] [2022-01-18 15:24:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:18,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:18,306 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) [2022-01-18 15:24:18,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:24:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:18,487 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 [2022-01-18 15:24:18,594 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 59 treesize of output 47 [2022-01-18 15:24:18,596 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 51 treesize of output 41 [2022-01-18 15:24:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:18,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:18,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:18,926 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 13 treesize of output 17 [2022-01-18 15:24:18,970 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:18,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:18,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:18,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919509878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:18,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:18,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:18,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077089835] [2022-01-18 15:24:18,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:18,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:18,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:18,978 INFO L87 Difference]: Start difference. First operand 457 states and 1372 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) [2022-01-18 15:24:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:19,580 INFO L93 Difference]: Finished difference Result 985 states and 2899 transitions. [2022-01-18 15:24:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:24:19,581 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 [2022-01-18 15:24:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:19,582 INFO L225 Difference]: With dead ends: 985 [2022-01-18 15:24:19,582 INFO L226 Difference]: Without dead ends: 985 [2022-01-18 15:24:19,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:24:19,582 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 214 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:19,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 248 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-18 15:24:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 471. [2022-01-18 15:24:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0531914893617023) internal successors, (1435), 470 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1435 transitions. [2022-01-18 15:24:19,589 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1435 transitions. Word has length 22 [2022-01-18 15:24:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1435 transitions. [2022-01-18 15:24:19,589 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) [2022-01-18 15:24:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1435 transitions. [2022-01-18 15:24:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:19,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:19,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:19,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:19,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:19,805 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash 941068435, now seen corresponding path program 104 times [2022-01-18 15:24:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347918677] [2022-01-18 15:24:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:19,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:19,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347918677] [2022-01-18 15:24:19,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347918677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079855463] [2022-01-18 15:24:19,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:19,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:19,902 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) [2022-01-18 15:24:19,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:24:20,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:20,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:20,104 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 29 treesize of output 23 [2022-01-18 15:24:20,249 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 59 treesize of output 47 [2022-01-18 15:24:20,251 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 51 treesize of output 41 [2022-01-18 15:24:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:20,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:20,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:20,519 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 13 treesize of output 17 [2022-01-18 15:24:20,551 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:20,551 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 8 treesize of output 7 [2022-01-18 15:24:20,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:20,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079855463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:20,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:20,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:24:20,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857215384] [2022-01-18 15:24:20,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:20,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:20,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:20,557 INFO L87 Difference]: Start difference. First operand 471 states and 1435 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) [2022-01-18 15:24:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:20,927 INFO L93 Difference]: Finished difference Result 1001 states and 2934 transitions. [2022-01-18 15:24:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:20,927 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 [2022-01-18 15:24:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:20,929 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 15:24:20,929 INFO L226 Difference]: Without dead ends: 991 [2022-01-18 15:24:20,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:24:20,929 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 253 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:20,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 180 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-18 15:24:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 478. [2022-01-18 15:24:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0377358490566038) internal successors, (1449), 477 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1449 transitions. [2022-01-18 15:24:20,936 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1449 transitions. Word has length 22 [2022-01-18 15:24:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:20,936 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1449 transitions. [2022-01-18 15:24:20,936 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) [2022-01-18 15:24:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1449 transitions. [2022-01-18 15:24:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:20,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:20,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:20,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:21,138 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,SelfDestructingSolverStorable120 [2022-01-18 15:24:21,138 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1982143627, now seen corresponding path program 105 times [2022-01-18 15:24:21,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337163276] [2022-01-18 15:24:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:21,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:21,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337163276] [2022-01-18 15:24:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337163276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294841299] [2022-01-18 15:24:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:21,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:21,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:21,225 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) [2022-01-18 15:24:21,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:24:21,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:21,415 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 29 treesize of output 23 [2022-01-18 15:24:21,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:21,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:21,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:21,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:21,884 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 13 treesize of output 17 [2022-01-18 15:24:21,923 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:21,923 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 8 treesize of output 7 [2022-01-18 15:24:21,925 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 [2022-01-18 15:24:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:21,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294841299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:21,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:21,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:21,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540183285] [2022-01-18 15:24:21,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:21,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:21,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:21,930 INFO L87 Difference]: Start difference. First operand 478 states and 1449 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) [2022-01-18 15:24:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:22,604 INFO L93 Difference]: Finished difference Result 1072 states and 3124 transitions. [2022-01-18 15:24:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:24:22,604 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 [2022-01-18 15:24:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:22,605 INFO L225 Difference]: With dead ends: 1072 [2022-01-18 15:24:22,605 INFO L226 Difference]: Without dead ends: 1072 [2022-01-18 15:24:22,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:24:22,606 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 363 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:22,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 222 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-18 15:24:22,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 476. [2022-01-18 15:24:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.031578947368421) internal successors, (1440), 475 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1440 transitions. [2022-01-18 15:24:22,613 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1440 transitions. Word has length 22 [2022-01-18 15:24:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:22,613 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1440 transitions. [2022-01-18 15:24:22,613 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) [2022-01-18 15:24:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1440 transitions. [2022-01-18 15:24:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:22,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:22,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:22,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:22,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:22,828 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -94685677, now seen corresponding path program 106 times [2022-01-18 15:24:22,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:22,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572267533] [2022-01-18 15:24:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:22,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:22,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572267533] [2022-01-18 15:24:22,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572267533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301199008] [2022-01-18 15:24:22,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:22,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:22,893 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) [2022-01-18 15:24:22,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:24:23,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:23,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:23,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:23,194 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 59 treesize of output 47 [2022-01-18 15:24:23,195 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 51 treesize of output 41 [2022-01-18 15:24:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:23,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:23,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:23,474 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 13 treesize of output 17 [2022-01-18 15:24:23,518 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:23,519 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 [2022-01-18 15:24:23,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:23,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301199008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:23,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:23,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:24:23,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884557627] [2022-01-18 15:24:23,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:23,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:23,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:23,527 INFO L87 Difference]: Start difference. First operand 476 states and 1440 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) [2022-01-18 15:24:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:24,057 INFO L93 Difference]: Finished difference Result 1026 states and 3004 transitions. [2022-01-18 15:24:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:24,057 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 [2022-01-18 15:24:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:24,059 INFO L225 Difference]: With dead ends: 1026 [2022-01-18 15:24:24,059 INFO L226 Difference]: Without dead ends: 1017 [2022-01-18 15:24:24,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:24:24,059 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 159 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:24,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 231 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-18 15:24:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 490. [2022-01-18 15:24:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.042944785276074) internal successors, (1488), 489 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1488 transitions. [2022-01-18 15:24:24,066 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1488 transitions. Word has length 22 [2022-01-18 15:24:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:24,066 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1488 transitions. [2022-01-18 15:24:24,066 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) [2022-01-18 15:24:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1488 transitions. [2022-01-18 15:24:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:24,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:24,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:24,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:24,282 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,SelfDestructingSolverStorable122 [2022-01-18 15:24:24,282 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:24,282 INFO L85 PathProgramCache]: Analyzing trace with hash 247563817, now seen corresponding path program 107 times [2022-01-18 15:24:24,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:24,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254697036] [2022-01-18 15:24:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:24,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:24,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254697036] [2022-01-18 15:24:24,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254697036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217646805] [2022-01-18 15:24:24,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:24,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:24,343 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) [2022-01-18 15:24:24,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:24:24,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:24,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:24,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:24,629 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 51 treesize of output 41 [2022-01-18 15:24:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:24,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:24,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:24,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:24,881 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:24,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:24,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:24,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217646805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:24,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:24,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:24,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032545603] [2022-01-18 15:24:24,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:24,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:24,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:24,888 INFO L87 Difference]: Start difference. First operand 490 states and 1488 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) [2022-01-18 15:24:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:25,306 INFO L93 Difference]: Finished difference Result 1068 states and 3088 transitions. [2022-01-18 15:24:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:25,306 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 [2022-01-18 15:24:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:25,308 INFO L225 Difference]: With dead ends: 1068 [2022-01-18 15:24:25,308 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 15:24:25,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:25,308 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 182 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:25,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 238 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 15:24:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 502. [2022-01-18 15:24:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.0459081836327346) internal successors, (1526), 501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1526 transitions. [2022-01-18 15:24:25,317 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1526 transitions. Word has length 22 [2022-01-18 15:24:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:25,317 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1526 transitions. [2022-01-18 15:24:25,317 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) [2022-01-18 15:24:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1526 transitions. [2022-01-18 15:24:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:25,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:25,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:25,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:25,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:25,534 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1333208099, now seen corresponding path program 108 times [2022-01-18 15:24:25,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:25,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037236756] [2022-01-18 15:24:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:25,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:25,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:25,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037236756] [2022-01-18 15:24:25,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037236756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:25,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048575170] [2022-01-18 15:24:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:25,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:25,617 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) [2022-01-18 15:24:25,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:24:25,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:24:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:25,754 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 29 treesize of output 23 [2022-01-18 15:24:25,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:25,829 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 52 treesize of output 42 [2022-01-18 15:24:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:25,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:25,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:25,973 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:24:25,997 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:25,997 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 [2022-01-18 15:24:25,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:26,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048575170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:26,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:26,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:26,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69858145] [2022-01-18 15:24:26,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:26,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:26,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:26,003 INFO L87 Difference]: Start difference. First operand 502 states and 1526 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) [2022-01-18 15:24:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:26,325 INFO L93 Difference]: Finished difference Result 1015 states and 2951 transitions. [2022-01-18 15:24:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:26,326 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 [2022-01-18 15:24:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:26,327 INFO L225 Difference]: With dead ends: 1015 [2022-01-18 15:24:26,327 INFO L226 Difference]: Without dead ends: 1003 [2022-01-18 15:24:26,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:26,328 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:26,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 211 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-18 15:24:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 498. [2022-01-18 15:24:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.046277665995976) internal successors, (1514), 497 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1514 transitions. [2022-01-18 15:24:26,335 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1514 transitions. Word has length 22 [2022-01-18 15:24:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1514 transitions. [2022-01-18 15:24:26,335 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) [2022-01-18 15:24:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1514 transitions. [2022-01-18 15:24:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:26,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:26,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:26,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 15:24:26,537 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,SelfDestructingSolverStorable124 [2022-01-18 15:24:26,537 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1614312619, now seen corresponding path program 109 times [2022-01-18 15:24:26,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:26,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018245073] [2022-01-18 15:24:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:26,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:26,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018245073] [2022-01-18 15:24:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018245073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338674466] [2022-01-18 15:24:26,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:26,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:26,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:26,621 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) [2022-01-18 15:24:26,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:24:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:26,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:26,801 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 29 treesize of output 23 [2022-01-18 15:24:26,939 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 55 treesize of output 45 [2022-01-18 15:24:26,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:27,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:27,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:27,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:27,226 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:27,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:27,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:27,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338674466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:27,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:27,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:27,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089161002] [2022-01-18 15:24:27,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:27,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:27,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:27,232 INFO L87 Difference]: Start difference. First operand 498 states and 1514 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) [2022-01-18 15:24:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:27,627 INFO L93 Difference]: Finished difference Result 941 states and 2770 transitions. [2022-01-18 15:24:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:27,628 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 [2022-01-18 15:24:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:27,629 INFO L225 Difference]: With dead ends: 941 [2022-01-18 15:24:27,629 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 15:24:27,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:27,629 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:27,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 268 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 15:24:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 503. [2022-01-18 15:24:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.041832669322709) internal successors, (1527), 502 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1527 transitions. [2022-01-18 15:24:27,636 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1527 transitions. Word has length 22 [2022-01-18 15:24:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:27,636 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1527 transitions. [2022-01-18 15:24:27,636 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) [2022-01-18 15:24:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1527 transitions. [2022-01-18 15:24:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:27,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:27,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:27,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 15:24:27,851 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,SelfDestructingSolverStorable125 [2022-01-18 15:24:27,851 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash -119709655, now seen corresponding path program 110 times [2022-01-18 15:24:27,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:27,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798134270] [2022-01-18 15:24:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:27,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:27,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798134270] [2022-01-18 15:24:27,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798134270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66850918] [2022-01-18 15:24:27,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:27,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:27,908 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) [2022-01-18 15:24:27,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:24:28,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:28,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:28,206 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 55 treesize of output 45 [2022-01-18 15:24:28,207 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 49 treesize of output 37 [2022-01-18 15:24:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:28,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:28,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:28,405 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 13 treesize of output 17 [2022-01-18 15:24:28,439 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:28,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:28,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:28,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66850918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:28,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:28,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:24:28,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502510768] [2022-01-18 15:24:28,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:28,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:28,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:28,446 INFO L87 Difference]: Start difference. First operand 503 states and 1527 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) [2022-01-18 15:24:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:28,891 INFO L93 Difference]: Finished difference Result 914 states and 2707 transitions. [2022-01-18 15:24:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:28,891 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 [2022-01-18 15:24:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:28,892 INFO L225 Difference]: With dead ends: 914 [2022-01-18 15:24:28,892 INFO L226 Difference]: Without dead ends: 904 [2022-01-18 15:24:28,892 INFO L932 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 [2022-01-18 15:24:28,893 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 168 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:28,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 227 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-18 15:24:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 482. [2022-01-18 15:24:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0228690228690227) internal successors, (1454), 481 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1454 transitions. [2022-01-18 15:24:28,899 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1454 transitions. Word has length 22 [2022-01-18 15:24:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:28,899 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1454 transitions. [2022-01-18 15:24:28,899 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) [2022-01-18 15:24:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1454 transitions. [2022-01-18 15:24:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:28,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:28,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:28,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 15:24:29,113 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,SelfDestructingSolverStorable126 [2022-01-18 15:24:29,114 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash -645629941, now seen corresponding path program 111 times [2022-01-18 15:24:29,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:29,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622277356] [2022-01-18 15:24:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:29,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:29,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622277356] [2022-01-18 15:24:29,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622277356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961114093] [2022-01-18 15:24:29,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:29,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:29,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:29,217 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) [2022-01-18 15:24:29,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:24:29,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:29,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:29,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:29,431 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 29 treesize of output 23 [2022-01-18 15:24:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:29,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:29,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:29,785 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:24:29,823 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:29,824 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 [2022-01-18 15:24:29,826 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 [2022-01-18 15:24:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:29,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961114093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:29,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:29,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:29,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382580520] [2022-01-18 15:24:29,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:29,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:29,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:29,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:29,830 INFO L87 Difference]: Start difference. First operand 482 states and 1454 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) [2022-01-18 15:24:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:30,193 INFO L93 Difference]: Finished difference Result 846 states and 2523 transitions. [2022-01-18 15:24:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:30,193 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 [2022-01-18 15:24:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:30,194 INFO L225 Difference]: With dead ends: 846 [2022-01-18 15:24:30,195 INFO L226 Difference]: Without dead ends: 846 [2022-01-18 15:24:30,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:30,195 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 117 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:30,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 204 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-01-18 15:24:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 479. [2022-01-18 15:24:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0230125523012554) internal successors, (1445), 478 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1445 transitions. [2022-01-18 15:24:30,201 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1445 transitions. Word has length 22 [2022-01-18 15:24:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:30,201 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1445 transitions. [2022-01-18 15:24:30,201 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) [2022-01-18 15:24:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1445 transitions. [2022-01-18 15:24:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:30,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:30,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:30,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:30,418 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,SelfDestructingSolverStorable127 [2022-01-18 15:24:30,418 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash -139412553, now seen corresponding path program 112 times [2022-01-18 15:24:30,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:30,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80663039] [2022-01-18 15:24:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:30,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:30,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80663039] [2022-01-18 15:24:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80663039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683531393] [2022-01-18 15:24:30,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:30,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:30,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:30,511 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) [2022-01-18 15:24:30,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:24:30,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:30,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:30,681 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 29 treesize of output 23 [2022-01-18 15:24:30,762 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 20 treesize of output 14 [2022-01-18 15:24:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:30,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:30,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:30,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:30,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:30,932 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 8 treesize of output 7 [2022-01-18 15:24:30,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:30,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683531393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:30,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:30,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:30,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213864556] [2022-01-18 15:24:30,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:30,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:30,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:30,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:30,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:30,937 INFO L87 Difference]: Start difference. First operand 479 states and 1445 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) [2022-01-18 15:24:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:31,339 INFO L93 Difference]: Finished difference Result 907 states and 2653 transitions. [2022-01-18 15:24:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:31,339 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 [2022-01-18 15:24:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:31,340 INFO L225 Difference]: With dead ends: 907 [2022-01-18 15:24:31,340 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 15:24:31,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:31,341 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 200 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:31,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 252 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 15:24:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 479. [2022-01-18 15:24:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0230125523012554) internal successors, (1445), 478 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1445 transitions. [2022-01-18 15:24:31,347 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1445 transitions. Word has length 22 [2022-01-18 15:24:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:31,347 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1445 transitions. [2022-01-18 15:24:31,347 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) [2022-01-18 15:24:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1445 transitions. [2022-01-18 15:24:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:31,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:31,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:31,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:31,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:31,560 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2078725439, now seen corresponding path program 113 times [2022-01-18 15:24:31,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:31,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5885119] [2022-01-18 15:24:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:31,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:31,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5885119] [2022-01-18 15:24:31,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5885119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476232617] [2022-01-18 15:24:31,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:31,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:31,667 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) [2022-01-18 15:24:31,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:24:31,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:31,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:31,876 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 29 treesize of output 23 [2022-01-18 15:24:32,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:32,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:32,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:32,249 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 13 treesize of output 17 [2022-01-18 15:24:32,278 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:32,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:32,280 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 [2022-01-18 15:24:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:32,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476232617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:32,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:32,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:32,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996842114] [2022-01-18 15:24:32,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:32,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:32,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:32,283 INFO L87 Difference]: Start difference. First operand 479 states and 1445 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) [2022-01-18 15:24:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:32,571 INFO L93 Difference]: Finished difference Result 894 states and 2624 transitions. [2022-01-18 15:24:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:32,572 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 [2022-01-18 15:24:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:32,573 INFO L225 Difference]: With dead ends: 894 [2022-01-18 15:24:32,573 INFO L226 Difference]: Without dead ends: 885 [2022-01-18 15:24:32,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:32,573 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:32,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-18 15:24:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 487. [2022-01-18 15:24:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.0102880658436213) internal successors, (1463), 486 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1463 transitions. [2022-01-18 15:24:32,579 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1463 transitions. Word has length 22 [2022-01-18 15:24:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:32,579 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1463 transitions. [2022-01-18 15:24:32,579 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) [2022-01-18 15:24:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1463 transitions. [2022-01-18 15:24:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:32,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:32,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:32,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:32,796 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2043126113, now seen corresponding path program 114 times [2022-01-18 15:24:32,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:32,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530616295] [2022-01-18 15:24:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:32,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:32,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:32,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530616295] [2022-01-18 15:24:32,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530616295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:32,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258255771] [2022-01-18 15:24:32,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:32,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:32,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:32,891 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) [2022-01-18 15:24:32,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:24:33,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:33,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:33,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:33,065 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 29 treesize of output 23 [2022-01-18 15:24:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:33,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:33,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:33,284 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 13 treesize of output 17 [2022-01-18 15:24:33,308 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:33,308 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 8 treesize of output 7 [2022-01-18 15:24:33,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258255771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:33,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:33,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:33,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105715465] [2022-01-18 15:24:33,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:33,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:33,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:33,312 INFO L87 Difference]: Start difference. First operand 487 states and 1463 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) [2022-01-18 15:24:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:33,592 INFO L93 Difference]: Finished difference Result 817 states and 2433 transitions. [2022-01-18 15:24:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:33,592 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 [2022-01-18 15:24:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:33,593 INFO L225 Difference]: With dead ends: 817 [2022-01-18 15:24:33,593 INFO L226 Difference]: Without dead ends: 817 [2022-01-18 15:24:33,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:33,594 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:33,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 223 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-18 15:24:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 457. [2022-01-18 15:24:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.008771929824561) internal successors, (1372), 456 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1372 transitions. [2022-01-18 15:24:33,610 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1372 transitions. Word has length 22 [2022-01-18 15:24:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:33,610 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1372 transitions. [2022-01-18 15:24:33,610 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) [2022-01-18 15:24:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1372 transitions. [2022-01-18 15:24:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:33,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:33,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:33,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:33,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:33,829 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash -41099855, now seen corresponding path program 115 times [2022-01-18 15:24:33,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325725242] [2022-01-18 15:24:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:33,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:33,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325725242] [2022-01-18 15:24:33,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325725242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651659928] [2022-01-18 15:24:33,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:33,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:33,906 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) [2022-01-18 15:24:33,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:24:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:34,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:34,099 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 50 treesize of output 40 [2022-01-18 15:24:34,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:34,228 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 35 treesize of output 27 [2022-01-18 15:24:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:34,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:34,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:34,340 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 47 treesize of output 45 [2022-01-18 15:24:34,428 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:34,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:34,430 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 [2022-01-18 15:24:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:34,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651659928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:34,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:34,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:34,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315861113] [2022-01-18 15:24:34,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:34,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:34,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:34,432 INFO L87 Difference]: Start difference. First operand 457 states and 1372 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) [2022-01-18 15:24:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:34,676 INFO L93 Difference]: Finished difference Result 664 states and 1956 transitions. [2022-01-18 15:24:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:34,676 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 [2022-01-18 15:24:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:34,677 INFO L225 Difference]: With dead ends: 664 [2022-01-18 15:24:34,677 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 15:24:34,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:34,677 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:34,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 188 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 15:24:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 467. [2022-01-18 15:24:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0300429184549356) internal successors, (1412), 466 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1412 transitions. [2022-01-18 15:24:34,682 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1412 transitions. Word has length 22 [2022-01-18 15:24:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:34,683 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1412 transitions. [2022-01-18 15:24:34,683 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) [2022-01-18 15:24:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1412 transitions. [2022-01-18 15:24:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:34,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:34,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:34,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:34,899 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1453503109, now seen corresponding path program 116 times [2022-01-18 15:24:34,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:34,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922531728] [2022-01-18 15:24:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:34,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:34,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922531728] [2022-01-18 15:24:34,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922531728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056056908] [2022-01-18 15:24:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:34,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:34,970 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) [2022-01-18 15:24:34,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:24:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:35,213 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 50 treesize of output 40 [2022-01-18 15:24:35,409 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 39 treesize of output 31 [2022-01-18 15:24:35,411 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 35 treesize of output 27 [2022-01-18 15:24:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:35,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:35,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:35,548 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 47 treesize of output 45 [2022-01-18 15:24:35,678 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:35,678 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 [2022-01-18 15:24:35,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:35,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056056908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:35,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:35,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:35,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137376308] [2022-01-18 15:24:35,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:35,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:35,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:35,683 INFO L87 Difference]: Start difference. First operand 467 states and 1412 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) [2022-01-18 15:24:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:36,071 INFO L93 Difference]: Finished difference Result 689 states and 2025 transitions. [2022-01-18 15:24:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:36,071 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 [2022-01-18 15:24:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:36,072 INFO L225 Difference]: With dead ends: 689 [2022-01-18 15:24:36,072 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 15:24:36,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:36,072 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 167 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:36,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 232 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 15:24:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 464. [2022-01-18 15:24:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.023758099352052) internal successors, (1400), 463 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1400 transitions. [2022-01-18 15:24:36,078 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1400 transitions. Word has length 22 [2022-01-18 15:24:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:36,078 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1400 transitions. [2022-01-18 15:24:36,078 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) [2022-01-18 15:24:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1400 transitions. [2022-01-18 15:24:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:36,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:36,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:36,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:36,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:36,291 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1878450319, now seen corresponding path program 117 times [2022-01-18 15:24:36,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028791403] [2022-01-18 15:24:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:36,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:36,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028791403] [2022-01-18 15:24:36,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028791403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539927981] [2022-01-18 15:24:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:36,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:36,348 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) [2022-01-18 15:24:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:24:36,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:36,535 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 50 treesize of output 40 [2022-01-18 15:24:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:36,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:36,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:36,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:36,915 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:36,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:36,917 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 [2022-01-18 15:24:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:36,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539927981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:36,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:36,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:36,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586662427] [2022-01-18 15:24:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:36,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:36,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:36,922 INFO L87 Difference]: Start difference. First operand 464 states and 1400 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) [2022-01-18 15:24:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:37,323 INFO L93 Difference]: Finished difference Result 662 states and 1962 transitions. [2022-01-18 15:24:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:37,324 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 [2022-01-18 15:24:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:37,324 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:24:37,325 INFO L226 Difference]: Without dead ends: 642 [2022-01-18 15:24:37,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:37,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:37,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 198 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-18 15:24:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 461. [2022-01-18 15:24:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.017391304347826) internal successors, (1388), 460 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1388 transitions. [2022-01-18 15:24:37,330 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1388 transitions. Word has length 22 [2022-01-18 15:24:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:37,330 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1388 transitions. [2022-01-18 15:24:37,330 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) [2022-01-18 15:24:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1388 transitions. [2022-01-18 15:24:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:37,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:37,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:37,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:37,543 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,SelfDestructingSolverStorable133 [2022-01-18 15:24:37,543 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1255511653, now seen corresponding path program 118 times [2022-01-18 15:24:37,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342913386] [2022-01-18 15:24:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:37,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342913386] [2022-01-18 15:24:37,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342913386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53029091] [2022-01-18 15:24:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:37,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:37,604 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) [2022-01-18 15:24:37,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:24:37,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:37,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:37,815 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 50 treesize of output 40 [2022-01-18 15:24:37,914 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 44 treesize of output 36 [2022-01-18 15:24:37,916 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 40 treesize of output 32 [2022-01-18 15:24:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:37,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:38,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:38,099 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 [2022-01-18 15:24:38,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:38,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:38,239 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 [2022-01-18 15:24:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:38,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53029091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:38,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:38,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:38,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775504128] [2022-01-18 15:24:38,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:38,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:38,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:38,243 INFO L87 Difference]: Start difference. First operand 461 states and 1388 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) [2022-01-18 15:24:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:38,564 INFO L93 Difference]: Finished difference Result 782 states and 2292 transitions. [2022-01-18 15:24:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:38,565 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 [2022-01-18 15:24:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:38,566 INFO L225 Difference]: With dead ends: 782 [2022-01-18 15:24:38,566 INFO L226 Difference]: Without dead ends: 782 [2022-01-18 15:24:38,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:24:38,566 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:38,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 241 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-18 15:24:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 471. [2022-01-18 15:24:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0531914893617023) internal successors, (1435), 470 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1435 transitions. [2022-01-18 15:24:38,572 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1435 transitions. Word has length 22 [2022-01-18 15:24:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:38,572 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1435 transitions. [2022-01-18 15:24:38,572 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) [2022-01-18 15:24:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1435 transitions. [2022-01-18 15:24:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:38,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:38,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:38,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:38,787 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,SelfDestructingSolverStorable134 [2022-01-18 15:24:38,787 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:38,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1544852679, now seen corresponding path program 119 times [2022-01-18 15:24:38,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:38,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607085919] [2022-01-18 15:24:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:38,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:38,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:38,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607085919] [2022-01-18 15:24:38,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607085919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801628754] [2022-01-18 15:24:38,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:38,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:38,849 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) [2022-01-18 15:24:38,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:24:38,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:39,043 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 50 treesize of output 40 [2022-01-18 15:24:39,112 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 44 treesize of output 36 [2022-01-18 15:24:39,113 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 40 treesize of output 32 [2022-01-18 15:24:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:39,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:39,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:39,252 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 47 treesize of output 45 [2022-01-18 15:24:39,357 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:39,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:39,359 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 [2022-01-18 15:24:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:39,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801628754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:39,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:39,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:39,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124079980] [2022-01-18 15:24:39,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:39,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:39,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:39,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:39,363 INFO L87 Difference]: Start difference. First operand 471 states and 1435 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) [2022-01-18 15:24:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:39,740 INFO L93 Difference]: Finished difference Result 844 states and 2458 transitions. [2022-01-18 15:24:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:39,740 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 [2022-01-18 15:24:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:39,741 INFO L225 Difference]: With dead ends: 844 [2022-01-18 15:24:39,741 INFO L226 Difference]: Without dead ends: 834 [2022-01-18 15:24:39,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:39,742 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 192 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:39,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 215 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-18 15:24:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 478. [2022-01-18 15:24:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0377358490566038) internal successors, (1449), 477 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1449 transitions. [2022-01-18 15:24:39,747 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1449 transitions. Word has length 22 [2022-01-18 15:24:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:39,747 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1449 transitions. [2022-01-18 15:24:39,748 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) [2022-01-18 15:24:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1449 transitions. [2022-01-18 15:24:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:39,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:39,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:39,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:39,958 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,SelfDestructingSolverStorable135 [2022-01-18 15:24:39,958 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash -503777487, now seen corresponding path program 120 times [2022-01-18 15:24:39,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353651831] [2022-01-18 15:24:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:39,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:40,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353651831] [2022-01-18 15:24:40,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353651831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119878480] [2022-01-18 15:24:40,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:40,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:40,083 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) [2022-01-18 15:24:40,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:24:40,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:40,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:40,434 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 45 treesize of output 35 [2022-01-18 15:24:40,436 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 39 treesize of output 33 [2022-01-18 15:24:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:40,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:40,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:40,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:40,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:40,812 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 8 treesize of output 7 [2022-01-18 15:24:40,814 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 [2022-01-18 15:24:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:40,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119878480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:40,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:40,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:40,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343525444] [2022-01-18 15:24:40,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:40,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:40,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:40,818 INFO L87 Difference]: Start difference. First operand 478 states and 1449 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) [2022-01-18 15:24:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:41,149 INFO L93 Difference]: Finished difference Result 790 states and 2287 transitions. [2022-01-18 15:24:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:41,149 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 [2022-01-18 15:24:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:41,150 INFO L225 Difference]: With dead ends: 790 [2022-01-18 15:24:41,150 INFO L226 Difference]: Without dead ends: 790 [2022-01-18 15:24:41,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:24:41,150 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 238 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:41,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 180 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-18 15:24:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 459. [2022-01-18 15:24:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.010917030567686) internal successors, (1379), 458 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1379 transitions. [2022-01-18 15:24:41,156 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1379 transitions. Word has length 22 [2022-01-18 15:24:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:41,156 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1379 transitions. [2022-01-18 15:24:41,156 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) [2022-01-18 15:24:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1379 transitions. [2022-01-18 15:24:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:41,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:41,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:41,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:41,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 15:24:41,373 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:41,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1714360505, now seen corresponding path program 121 times [2022-01-18 15:24:41,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:41,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321267322] [2022-01-18 15:24:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:41,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:41,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321267322] [2022-01-18 15:24:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321267322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179061241] [2022-01-18 15:24:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:41,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:41,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:41,442 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) [2022-01-18 15:24:41,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:24:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:41,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:41,652 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 50 treesize of output 40 [2022-01-18 15:24:41,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:41,761 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 41 treesize of output 33 [2022-01-18 15:24:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:41,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:41,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:42,028 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:42,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:42,030 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 [2022-01-18 15:24:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:42,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179061241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:42,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:42,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:42,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353481978] [2022-01-18 15:24:42,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:42,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:42,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:42,034 INFO L87 Difference]: Start difference. First operand 459 states and 1379 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) [2022-01-18 15:24:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:42,368 INFO L93 Difference]: Finished difference Result 745 states and 2167 transitions. [2022-01-18 15:24:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:42,368 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 [2022-01-18 15:24:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:42,369 INFO L225 Difference]: With dead ends: 745 [2022-01-18 15:24:42,369 INFO L226 Difference]: Without dead ends: 736 [2022-01-18 15:24:42,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:42,369 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:42,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 240 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-01-18 15:24:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 475. [2022-01-18 15:24:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.029535864978903) internal successors, (1436), 474 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1436 transitions. [2022-01-18 15:24:42,375 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1436 transitions. Word has length 22 [2022-01-18 15:24:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1436 transitions. [2022-01-18 15:24:42,375 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) [2022-01-18 15:24:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1436 transitions. [2022-01-18 15:24:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:42,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:42,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:42,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:42,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:42,591 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2056609999, now seen corresponding path program 122 times [2022-01-18 15:24:42,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:42,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239158214] [2022-01-18 15:24:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:42,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:42,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:42,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239158214] [2022-01-18 15:24:42,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239158214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:42,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229498273] [2022-01-18 15:24:42,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:42,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:42,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:42,696 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) [2022-01-18 15:24:42,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:24:42,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:42,925 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 50 treesize of output 40 [2022-01-18 15:24:43,022 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 44 treesize of output 36 [2022-01-18 15:24:43,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:43,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:43,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:43,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:43,217 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:43,218 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 8 treesize of output 7 [2022-01-18 15:24:43,219 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 [2022-01-18 15:24:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:43,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229498273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:43,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:43,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837712122] [2022-01-18 15:24:43,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:43,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:43,222 INFO L87 Difference]: Start difference. First operand 475 states and 1436 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) [2022-01-18 15:24:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:43,619 INFO L93 Difference]: Finished difference Result 847 states and 2416 transitions. [2022-01-18 15:24:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:43,620 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 [2022-01-18 15:24:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:43,621 INFO L225 Difference]: With dead ends: 847 [2022-01-18 15:24:43,621 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 15:24:43,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:43,622 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 238 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:43,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 215 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 15:24:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 497. [2022-01-18 15:24:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.024193548387097) internal successors, (1500), 496 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1500 transitions. [2022-01-18 15:24:43,631 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1500 transitions. Word has length 22 [2022-01-18 15:24:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:43,631 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1500 transitions. [2022-01-18 15:24:43,631 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) [2022-01-18 15:24:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1500 transitions. [2022-01-18 15:24:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:43,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:43,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:43,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:43,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:43,848 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 475838083, now seen corresponding path program 123 times [2022-01-18 15:24:43,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:43,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54772981] [2022-01-18 15:24:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:43,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:43,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54772981] [2022-01-18 15:24:43,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54772981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713229630] [2022-01-18 15:24:43,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:43,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:43,897 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) [2022-01-18 15:24:43,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:24:44,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:44,063 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 50 treesize of output 40 [2022-01-18 15:24:44,190 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 45 treesize of output 37 [2022-01-18 15:24:44,192 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 41 treesize of output 33 [2022-01-18 15:24:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:44,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:44,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:44,399 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 47 treesize of output 45 [2022-01-18 15:24:44,552 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:44,552 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 [2022-01-18 15:24:44,554 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 [2022-01-18 15:24:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:44,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713229630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:44,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:44,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:44,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023877912] [2022-01-18 15:24:44,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:44,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:44,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:44,559 INFO L87 Difference]: Start difference. First operand 497 states and 1500 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) [2022-01-18 15:24:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:44,968 INFO L93 Difference]: Finished difference Result 804 states and 2305 transitions. [2022-01-18 15:24:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:44,969 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 [2022-01-18 15:24:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:44,970 INFO L225 Difference]: With dead ends: 804 [2022-01-18 15:24:44,970 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 15:24:44,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:44,970 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:44,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 222 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 15:24:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 477. [2022-01-18 15:24:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.0252100840336134) internal successors, (1440), 476 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1440 transitions. [2022-01-18 15:24:44,976 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1440 transitions. Word has length 22 [2022-01-18 15:24:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:44,976 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1440 transitions. [2022-01-18 15:24:44,976 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) [2022-01-18 15:24:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1440 transitions. [2022-01-18 15:24:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:44,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:44,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:44,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:45,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 15:24:45,187 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1854643641, now seen corresponding path program 124 times [2022-01-18 15:24:45,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:45,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388557275] [2022-01-18 15:24:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:45,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:45,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388557275] [2022-01-18 15:24:45,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388557275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769186897] [2022-01-18 15:24:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:45,264 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) [2022-01-18 15:24:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:24:45,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:45,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:45,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:45,475 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 50 treesize of output 40 [2022-01-18 15:24:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:45,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:45,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:45,650 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 47 treesize of output 45 [2022-01-18 15:24:45,731 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:45,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:45,733 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 [2022-01-18 15:24:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769186897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:45,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:45,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:45,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739493242] [2022-01-18 15:24:45,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:45,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:45,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:45,736 INFO L87 Difference]: Start difference. First operand 477 states and 1440 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) [2022-01-18 15:24:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:45,959 INFO L93 Difference]: Finished difference Result 669 states and 1985 transitions. [2022-01-18 15:24:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:45,959 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 [2022-01-18 15:24:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:45,960 INFO L225 Difference]: With dead ends: 669 [2022-01-18 15:24:45,960 INFO L226 Difference]: Without dead ends: 649 [2022-01-18 15:24:45,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:45,960 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:45,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 151 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-18 15:24:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 483. [2022-01-18 15:24:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0145228215767634) internal successors, (1453), 482 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1453 transitions. [2022-01-18 15:24:45,966 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1453 transitions. Word has length 22 [2022-01-18 15:24:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1453 transitions. [2022-01-18 15:24:45,966 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) [2022-01-18 15:24:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1453 transitions. [2022-01-18 15:24:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:45,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:45,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:45,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:46,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:46,183 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 95354501, now seen corresponding path program 125 times [2022-01-18 15:24:46,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:46,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606227719] [2022-01-18 15:24:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:46,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:46,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:46,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606227719] [2022-01-18 15:24:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606227719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:46,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538908049] [2022-01-18 15:24:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:46,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:46,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:46,279 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) [2022-01-18 15:24:46,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:24:46,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:46,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:46,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:46,685 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 28 treesize of output 22 [2022-01-18 15:24:46,687 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 26 treesize of output 20 [2022-01-18 15:24:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:46,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:46,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:46,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:46,943 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:46,943 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 8 treesize of output 7 [2022-01-18 15:24:46,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:46,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538908049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:46,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:46,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:46,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508793681] [2022-01-18 15:24:46,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:46,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:46,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:46,951 INFO L87 Difference]: Start difference. First operand 483 states and 1453 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) [2022-01-18 15:24:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:47,452 INFO L93 Difference]: Finished difference Result 747 states and 2163 transitions. [2022-01-18 15:24:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:47,453 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 [2022-01-18 15:24:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:47,454 INFO L225 Difference]: With dead ends: 747 [2022-01-18 15:24:47,454 INFO L226 Difference]: Without dead ends: 737 [2022-01-18 15:24:47,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:47,454 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 165 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:47,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 255 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-18 15:24:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 505. [2022-01-18 15:24:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.009920634920635) internal successors, (1517), 504 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1517 transitions. [2022-01-18 15:24:47,460 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1517 transitions. Word has length 22 [2022-01-18 15:24:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1517 transitions. [2022-01-18 15:24:47,460 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) [2022-01-18 15:24:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1517 transitions. [2022-01-18 15:24:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:47,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:47,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:47,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 15:24:47,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:47,676 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1485417415, now seen corresponding path program 126 times [2022-01-18 15:24:47,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:47,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515679370] [2022-01-18 15:24:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:47,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:47,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515679370] [2022-01-18 15:24:47,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515679370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765964903] [2022-01-18 15:24:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:47,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:47,757 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) [2022-01-18 15:24:47,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:24:47,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:47,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:47,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:47,998 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 50 treesize of output 40 [2022-01-18 15:24:48,101 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 28 treesize of output 22 [2022-01-18 15:24:48,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:48,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:48,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:48,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:48,322 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:48,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:48,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:48,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765964903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:48,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:48,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:24:48,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071656956] [2022-01-18 15:24:48,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:48,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:48,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:48,329 INFO L87 Difference]: Start difference. First operand 505 states and 1517 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) [2022-01-18 15:24:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:48,718 INFO L93 Difference]: Finished difference Result 704 states and 2052 transitions. [2022-01-18 15:24:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:48,719 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 [2022-01-18 15:24:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:48,720 INFO L225 Difference]: With dead ends: 704 [2022-01-18 15:24:48,720 INFO L226 Difference]: Without dead ends: 689 [2022-01-18 15:24:48,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:48,720 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:48,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 232 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-18 15:24:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 479. [2022-01-18 15:24:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0209205020920504) internal successors, (1444), 478 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1444 transitions. [2022-01-18 15:24:48,725 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1444 transitions. Word has length 22 [2022-01-18 15:24:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1444 transitions. [2022-01-18 15:24:48,726 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) [2022-01-18 15:24:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1444 transitions. [2022-01-18 15:24:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:48,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:48,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:48,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:48,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:48,926 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:48,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:48,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1434517723, now seen corresponding path program 127 times [2022-01-18 15:24:48,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:48,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490925063] [2022-01-18 15:24:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:48,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:49,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490925063] [2022-01-18 15:24:49,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490925063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192110605] [2022-01-18 15:24:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:49,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:49,012 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) [2022-01-18 15:24:49,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:24:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:49,341 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 31 treesize of output 23 [2022-01-18 15:24:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:49,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:49,501 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:24:49,658 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:49,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:49,660 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 [2022-01-18 15:24:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192110605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:49,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:49,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691338762] [2022-01-18 15:24:49,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:49,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:49,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:49,665 INFO L87 Difference]: Start difference. First operand 479 states and 1444 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) [2022-01-18 15:24:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:49,955 INFO L93 Difference]: Finished difference Result 647 states and 1891 transitions. [2022-01-18 15:24:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:49,956 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 [2022-01-18 15:24:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:49,956 INFO L225 Difference]: With dead ends: 647 [2022-01-18 15:24:49,957 INFO L226 Difference]: Without dead ends: 647 [2022-01-18 15:24:49,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:49,957 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:49,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 179 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-18 15:24:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 482. [2022-01-18 15:24:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0103950103950106) internal successors, (1448), 481 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1448 transitions. [2022-01-18 15:24:49,962 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1448 transitions. Word has length 22 [2022-01-18 15:24:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1448 transitions. [2022-01-18 15:24:49,962 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) [2022-01-18 15:24:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1448 transitions. [2022-01-18 15:24:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:49,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:49,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:49,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:50,173 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1365846609, now seen corresponding path program 128 times [2022-01-18 15:24:50,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295308805] [2022-01-18 15:24:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:50,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:50,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295308805] [2022-01-18 15:24:50,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295308805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992701383] [2022-01-18 15:24:50,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:50,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:50,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:50,259 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) [2022-01-18 15:24:50,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:24:50,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:50,516 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 31 treesize of output 23 [2022-01-18 15:24:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:50,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:50,612 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 47 treesize of output 45 [2022-01-18 15:24:50,740 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:50,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:50,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:50,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992701383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:50,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:50,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:50,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069669642] [2022-01-18 15:24:50,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:50,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:50,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:50,745 INFO L87 Difference]: Start difference. First operand 482 states and 1448 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) [2022-01-18 15:24:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:51,008 INFO L93 Difference]: Finished difference Result 672 states and 1957 transitions. [2022-01-18 15:24:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:51,008 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 [2022-01-18 15:24:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:51,026 INFO L225 Difference]: With dead ends: 672 [2022-01-18 15:24:51,026 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:24:51,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:51,027 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:51,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 221 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:24:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 479. [2022-01-18 15:24:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.00418410041841) internal successors, (1436), 478 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1436 transitions. [2022-01-18 15:24:51,032 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1436 transitions. Word has length 22 [2022-01-18 15:24:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:51,032 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1436 transitions. [2022-01-18 15:24:51,032 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) [2022-01-18 15:24:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1436 transitions. [2022-01-18 15:24:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:51,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:51,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:51,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:51,263 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,SelfDestructingSolverStorable144 [2022-01-18 15:24:51,263 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:51,263 INFO L85 PathProgramCache]: Analyzing trace with hash -940899399, now seen corresponding path program 129 times [2022-01-18 15:24:51,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:51,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056677024] [2022-01-18 15:24:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:51,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:51,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056677024] [2022-01-18 15:24:51,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056677024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874745540] [2022-01-18 15:24:51,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:51,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:51,313 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) [2022-01-18 15:24:51,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:24:51,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:51,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:51,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:51,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:51,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:51,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:51,668 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 47 treesize of output 45 [2022-01-18 15:24:51,788 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:51,788 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 [2022-01-18 15:24:51,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:51,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874745540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:51,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:51,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:51,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861956796] [2022-01-18 15:24:51,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:51,793 INFO L87 Difference]: Start difference. First operand 479 states and 1436 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) [2022-01-18 15:24:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:52,038 INFO L93 Difference]: Finished difference Result 635 states and 1880 transitions. [2022-01-18 15:24:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:52,038 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 [2022-01-18 15:24:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:52,039 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:24:52,039 INFO L226 Difference]: Without dead ends: 615 [2022-01-18 15:24:52,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:52,039 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:52,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 229 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-18 15:24:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 461. [2022-01-18 15:24:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.008695652173913) internal successors, (1384), 460 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1384 transitions. [2022-01-18 15:24:52,044 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1384 transitions. Word has length 22 [2022-01-18 15:24:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:52,044 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1384 transitions. [2022-01-18 15:24:52,044 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) [2022-01-18 15:24:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1384 transitions. [2022-01-18 15:24:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:52,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:52,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:52,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:52,259 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,SelfDestructingSolverStorable145 [2022-01-18 15:24:52,259 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1398909669, now seen corresponding path program 130 times [2022-01-18 15:24:52,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:52,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807497933] [2022-01-18 15:24:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:52,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:52,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807497933] [2022-01-18 15:24:52,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807497933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341449325] [2022-01-18 15:24:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:52,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:52,330 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) [2022-01-18 15:24:52,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:24:52,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:52,603 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 20 treesize of output 14 [2022-01-18 15:24:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:52,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:52,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:52,739 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 18 treesize of output 22 [2022-01-18 15:24:52,825 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:52,825 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 [2022-01-18 15:24:52,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:52,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341449325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:52,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:52,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:52,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435111081] [2022-01-18 15:24:52,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:52,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:52,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:52,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:52,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:52,841 INFO L87 Difference]: Start difference. First operand 461 states and 1384 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) [2022-01-18 15:24:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:53,106 INFO L93 Difference]: Finished difference Result 718 states and 2111 transitions. [2022-01-18 15:24:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:24:53,106 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 [2022-01-18 15:24:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:53,107 INFO L225 Difference]: With dead ends: 718 [2022-01-18 15:24:53,107 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 15:24:53,108 INFO L932 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 [2022-01-18 15:24:53,108 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:53,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 193 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 15:24:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 473. [2022-01-18 15:24:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.0402542372881354) internal successors, (1435), 472 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1435 transitions. [2022-01-18 15:24:53,114 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1435 transitions. Word has length 22 [2022-01-18 15:24:53,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:53,114 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1435 transitions. [2022-01-18 15:24:53,114 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) [2022-01-18 15:24:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1435 transitions. [2022-01-18 15:24:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:53,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:53,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:53,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 15:24:53,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 15:24:53,315 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1401454663, now seen corresponding path program 131 times [2022-01-18 15:24:53,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272462504] [2022-01-18 15:24:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:53,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:53,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272462504] [2022-01-18 15:24:53,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272462504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236361589] [2022-01-18 15:24:53,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:53,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:53,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:53,409 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) [2022-01-18 15:24:53,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:24:53,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:53,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:53,698 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 20 treesize of output 14 [2022-01-18 15:24:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:53,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:53,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:53,823 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 16 treesize of output 20 [2022-01-18 15:24:53,918 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:53,918 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 8 treesize of output 7 [2022-01-18 15:24:53,920 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 [2022-01-18 15:24:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:53,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236361589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:53,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:53,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:53,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211465623] [2022-01-18 15:24:53,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:53,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:53,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:53,938 INFO L87 Difference]: Start difference. First operand 473 states and 1435 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) [2022-01-18 15:24:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:54,139 INFO L93 Difference]: Finished difference Result 688 states and 2027 transitions. [2022-01-18 15:24:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:24:54,139 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 [2022-01-18 15:24:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:54,140 INFO L225 Difference]: With dead ends: 688 [2022-01-18 15:24:54,140 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 15:24:54,140 INFO L932 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 [2022-01-18 15:24:54,140 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:54,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 15:24:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 480. [2022-01-18 15:24:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0250521920668056) internal successors, (1449), 479 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1449 transitions. [2022-01-18 15:24:54,146 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1449 transitions. Word has length 22 [2022-01-18 15:24:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1449 transitions. [2022-01-18 15:24:54,146 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) [2022-01-18 15:24:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1449 transitions. [2022-01-18 15:24:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:54,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:54,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:54,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:54,367 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,SelfDestructingSolverStorable147 [2022-01-18 15:24:54,367 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1720566983, now seen corresponding path program 132 times [2022-01-18 15:24:54,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:54,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123765986] [2022-01-18 15:24:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:54,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:54,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:54,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123765986] [2022-01-18 15:24:54,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123765986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:54,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240366655] [2022-01-18 15:24:54,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:54,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:54,465 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) [2022-01-18 15:24:54,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:24:54,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:24:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:54,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:54,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:54,957 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 18 treesize of output 22 [2022-01-18 15:24:55,069 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:55,069 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 8 treesize of output 7 [2022-01-18 15:24:55,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:55,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240366655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:55,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:55,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:55,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541097352] [2022-01-18 15:24:55,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:55,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:55,076 INFO L87 Difference]: Start difference. First operand 480 states and 1449 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) [2022-01-18 15:24:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:55,358 INFO L93 Difference]: Finished difference Result 612 states and 1824 transitions. [2022-01-18 15:24:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:55,358 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 [2022-01-18 15:24:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:55,359 INFO L225 Difference]: With dead ends: 612 [2022-01-18 15:24:55,359 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 15:24:55,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:55,359 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:55,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 162 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 15:24:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 458. [2022-01-18 15:24:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.008752735229759) internal successors, (1375), 457 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1375 transitions. [2022-01-18 15:24:55,364 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1375 transitions. Word has length 22 [2022-01-18 15:24:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:55,364 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1375 transitions. [2022-01-18 15:24:55,364 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) [2022-01-18 15:24:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1375 transitions. [2022-01-18 15:24:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:55,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:55,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:55,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:55,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:55,576 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash -88220487, now seen corresponding path program 133 times [2022-01-18 15:24:55,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:55,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165391944] [2022-01-18 15:24:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:55,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:55,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165391944] [2022-01-18 15:24:55,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165391944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025588267] [2022-01-18 15:24:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:55,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:55,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:55,641 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) [2022-01-18 15:24:55,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:24:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:55,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:55,852 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 29 treesize of output 23 [2022-01-18 15:24:55,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:55,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:55,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:56,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:56,110 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:24:56,154 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:56,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:56,155 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 [2022-01-18 15:24:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:56,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025588267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:56,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:56,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:56,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269954752] [2022-01-18 15:24:56,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:56,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:56,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:56,159 INFO L87 Difference]: Start difference. First operand 458 states and 1375 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) [2022-01-18 15:24:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:56,470 INFO L93 Difference]: Finished difference Result 805 states and 2356 transitions. [2022-01-18 15:24:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:24:56,470 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 [2022-01-18 15:24:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:56,471 INFO L225 Difference]: With dead ends: 805 [2022-01-18 15:24:56,471 INFO L226 Difference]: Without dead ends: 805 [2022-01-18 15:24:56,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:24:56,472 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 161 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:56,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-18 15:24:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 472. [2022-01-18 15:24:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.05307855626327) internal successors, (1438), 471 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1438 transitions. [2022-01-18 15:24:56,477 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1438 transitions. Word has length 22 [2022-01-18 15:24:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:56,477 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1438 transitions. [2022-01-18 15:24:56,478 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) [2022-01-18 15:24:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1438 transitions. [2022-01-18 15:24:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:56,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:56,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:56,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:56,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 15:24:56,693 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1406382477, now seen corresponding path program 134 times [2022-01-18 15:24:56,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:56,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512987846] [2022-01-18 15:24:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:56,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:56,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:56,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512987846] [2022-01-18 15:24:56,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512987846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800244079] [2022-01-18 15:24:56,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:56,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:56,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:56,747 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) [2022-01-18 15:24:56,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:24:56,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:56,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:56,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:57,058 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 59 treesize of output 47 [2022-01-18 15:24:57,060 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 51 treesize of output 41 [2022-01-18 15:24:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:57,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:57,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:57,375 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:57,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:24:57,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:24:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:57,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800244079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:57,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:57,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:24:57,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763050188] [2022-01-18 15:24:57,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:57,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:57,382 INFO L87 Difference]: Start difference. First operand 472 states and 1438 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) [2022-01-18 15:24:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:57,714 INFO L93 Difference]: Finished difference Result 818 states and 2379 transitions. [2022-01-18 15:24:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:24:57,715 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 [2022-01-18 15:24:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:57,716 INFO L225 Difference]: With dead ends: 818 [2022-01-18 15:24:57,716 INFO L226 Difference]: Without dead ends: 808 [2022-01-18 15:24:57,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:57,716 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 190 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:57,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 172 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-18 15:24:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 479. [2022-01-18 15:24:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0376569037656904) internal successors, (1452), 478 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1452 transitions. [2022-01-18 15:24:57,722 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1452 transitions. Word has length 22 [2022-01-18 15:24:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:57,722 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1452 transitions. [2022-01-18 15:24:57,722 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) [2022-01-18 15:24:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1452 transitions. [2022-01-18 15:24:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:57,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:57,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:57,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:57,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:57,938 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1847509627, now seen corresponding path program 135 times [2022-01-18 15:24:57,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943163158] [2022-01-18 15:24:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:57,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:58,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943163158] [2022-01-18 15:24:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943163158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24682885] [2022-01-18 15:24:58,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:58,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:58,032 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) [2022-01-18 15:24:58,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:24:58,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:58,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:58,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:58,279 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 29 treesize of output 23 [2022-01-18 15:24:58,389 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 59 treesize of output 47 [2022-01-18 15:24:58,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:24:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:58,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:58,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:58,678 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 18 treesize of output 22 [2022-01-18 15:24:58,758 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:24:58,758 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 [2022-01-18 15:24:58,760 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 [2022-01-18 15:24:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:58,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24682885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:58,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:58,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:24:58,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343726002] [2022-01-18 15:24:58,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:58,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:24:58,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:24:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:58,765 INFO L87 Difference]: Start difference. First operand 479 states and 1452 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) [2022-01-18 15:24:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:59,330 INFO L93 Difference]: Finished difference Result 916 states and 2638 transitions. [2022-01-18 15:24:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:24:59,330 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 [2022-01-18 15:24:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:59,331 INFO L225 Difference]: With dead ends: 916 [2022-01-18 15:24:59,331 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 15:24:59,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:24:59,332 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:59,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 310 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 15:24:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 477. [2022-01-18 15:24:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.0315126050420167) internal successors, (1443), 476 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1443 transitions. [2022-01-18 15:24:59,338 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1443 transitions. Word has length 22 [2022-01-18 15:24:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:59,338 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1443 transitions. [2022-01-18 15:24:59,338 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) [2022-01-18 15:24:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1443 transitions. [2022-01-18 15:24:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:24:59,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:59,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:59,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:59,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:59,539 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash 370628365, now seen corresponding path program 136 times [2022-01-18 15:24:59,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:59,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454504180] [2022-01-18 15:24:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:59,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:59,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:59,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454504180] [2022-01-18 15:24:59,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454504180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:59,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324080244] [2022-01-18 15:24:59,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:59,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:59,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:59,612 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) [2022-01-18 15:24:59,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:24:59,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:24:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:59,868 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 29 treesize of output 23 [2022-01-18 15:24:59,980 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 60 treesize of output 48 [2022-01-18 15:24:59,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:00,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:00,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:00,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:00,314 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:00,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:00,316 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 [2022-01-18 15:25:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:00,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324080244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:00,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:00,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:00,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444543978] [2022-01-18 15:25:00,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:00,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:00,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:00,321 INFO L87 Difference]: Start difference. First operand 477 states and 1443 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) [2022-01-18 15:25:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:00,719 INFO L93 Difference]: Finished difference Result 838 states and 2437 transitions. [2022-01-18 15:25:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:25:00,719 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 [2022-01-18 15:25:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:00,720 INFO L225 Difference]: With dead ends: 838 [2022-01-18 15:25:00,720 INFO L226 Difference]: Without dead ends: 829 [2022-01-18 15:25:00,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:25:00,721 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 203 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 [2022-01-18 15:25:00,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 203 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-18 15:25:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 491. [2022-01-18 15:25:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0428571428571427) internal successors, (1491), 490 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1491 transitions. [2022-01-18 15:25:00,727 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1491 transitions. Word has length 22 [2022-01-18 15:25:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:00,727 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1491 transitions. [2022-01-18 15:25:00,727 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) [2022-01-18 15:25:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1491 transitions. [2022-01-18 15:25:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:00,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:00,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:00,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:00,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:00,928 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 712877859, now seen corresponding path program 137 times [2022-01-18 15:25:00,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:00,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548265231] [2022-01-18 15:25:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:00,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:01,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548265231] [2022-01-18 15:25:01,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548265231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336012451] [2022-01-18 15:25:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:01,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:01,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:01,013 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) [2022-01-18 15:25:01,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:25:01,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:01,257 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 29 treesize of output 23 [2022-01-18 15:25:01,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:01,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:01,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:01,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:01,625 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 16 treesize of output 20 [2022-01-18 15:25:01,693 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:01,693 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 [2022-01-18 15:25:01,695 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 [2022-01-18 15:25:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:01,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336012451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:01,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:01,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:01,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651849686] [2022-01-18 15:25:01,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:01,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:01,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:01,700 INFO L87 Difference]: Start difference. First operand 491 states and 1491 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) [2022-01-18 15:25:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:02,130 INFO L93 Difference]: Finished difference Result 886 states and 2539 transitions. [2022-01-18 15:25:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:25:02,130 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 [2022-01-18 15:25:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:02,131 INFO L225 Difference]: With dead ends: 886 [2022-01-18 15:25:02,132 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 15:25:02,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:25:02,132 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 216 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:02,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 193 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 15:25:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 503. [2022-01-18 15:25:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.045816733067729) internal successors, (1529), 502 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1529 transitions. [2022-01-18 15:25:02,138 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1529 transitions. Word has length 22 [2022-01-18 15:25:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:02,138 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1529 transitions. [2022-01-18 15:25:02,138 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) [2022-01-18 15:25:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1529 transitions. [2022-01-18 15:25:02,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:02,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:02,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:02,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:02,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:02,339 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:02,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -867894057, now seen corresponding path program 138 times [2022-01-18 15:25:02,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722621298] [2022-01-18 15:25:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:02,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:02,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722621298] [2022-01-18 15:25:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722621298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126995303] [2022-01-18 15:25:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:02,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:02,430 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) [2022-01-18 15:25:02,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:25:02,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:25:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:02,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:02,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:02,797 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 51 treesize of output 41 [2022-01-18 15:25:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:02,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:03,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:03,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:03,094 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:03,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:03,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:03,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126995303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:03,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:03,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:03,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741014959] [2022-01-18 15:25:03,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:03,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:03,100 INFO L87 Difference]: Start difference. First operand 503 states and 1529 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) [2022-01-18 15:25:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:03,408 INFO L93 Difference]: Finished difference Result 833 states and 2402 transitions. [2022-01-18 15:25:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:03,408 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 [2022-01-18 15:25:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:03,409 INFO L225 Difference]: With dead ends: 833 [2022-01-18 15:25:03,409 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 15:25:03,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:25:03,410 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 127 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:03,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 246 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 15:25:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 499. [2022-01-18 15:25:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.0461847389558234) internal successors, (1517), 498 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1517 transitions. [2022-01-18 15:25:03,416 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1517 transitions. Word has length 22 [2022-01-18 15:25:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:03,416 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1517 transitions. [2022-01-18 15:25:03,416 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) [2022-01-18 15:25:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1517 transitions. [2022-01-18 15:25:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:03,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:03,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:03,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:03,631 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,SelfDestructingSolverStorable154 [2022-01-18 15:25:03,631 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1148998577, now seen corresponding path program 139 times [2022-01-18 15:25:03,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:03,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49126286] [2022-01-18 15:25:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:03,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:03,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49126286] [2022-01-18 15:25:03,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49126286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395162818] [2022-01-18 15:25:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:03,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:03,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:03,697 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) [2022-01-18 15:25:03,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:25:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:03,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:03,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:03,980 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 20 treesize of output 14 [2022-01-18 15:25:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:04,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:04,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:04,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:04,167 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:04,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:04,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395162818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:04,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:04,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:04,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303911579] [2022-01-18 15:25:04,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:04,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:04,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:04,172 INFO L87 Difference]: Start difference. First operand 499 states and 1517 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) [2022-01-18 15:25:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:04,546 INFO L93 Difference]: Finished difference Result 764 states and 2239 transitions. [2022-01-18 15:25:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:25:04,546 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 [2022-01-18 15:25:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:04,547 INFO L225 Difference]: With dead ends: 764 [2022-01-18 15:25:04,547 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 15:25:04,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:25:04,547 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:04,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 235 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 15:25:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 504. [2022-01-18 15:25:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0417495029821073) internal successors, (1530), 503 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1530 transitions. [2022-01-18 15:25:04,554 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1530 transitions. Word has length 22 [2022-01-18 15:25:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:04,554 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1530 transitions. [2022-01-18 15:25:04,554 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) [2022-01-18 15:25:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1530 transitions. [2022-01-18 15:25:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:04,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:04,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:04,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 15:25:04,755 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,SelfDestructingSolverStorable155 [2022-01-18 15:25:04,755 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash 345604387, now seen corresponding path program 140 times [2022-01-18 15:25:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598882929] [2022-01-18 15:25:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:04,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:04,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:04,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598882929] [2022-01-18 15:25:04,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598882929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:04,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721910232] [2022-01-18 15:25:04,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:04,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:04,824 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) [2022-01-18 15:25:04,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:25:04,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:05,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:05,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:05,104 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 49 treesize of output 37 [2022-01-18 15:25:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:05,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:05,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:05,283 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 18 treesize of output 22 [2022-01-18 15:25:05,340 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:05,340 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 8 treesize of output 7 [2022-01-18 15:25:05,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:05,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721910232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:05,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:05,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:05,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956162761] [2022-01-18 15:25:05,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:05,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:05,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:05,344 INFO L87 Difference]: Start difference. First operand 504 states and 1530 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) [2022-01-18 15:25:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:05,612 INFO L93 Difference]: Finished difference Result 734 states and 2164 transitions. [2022-01-18 15:25:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:25:05,612 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 [2022-01-18 15:25:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:05,613 INFO L225 Difference]: With dead ends: 734 [2022-01-18 15:25:05,613 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 15:25:05,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:25:05,613 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:05,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 218 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 15:25:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 483. [2022-01-18 15:25:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0228215767634854) internal successors, (1457), 482 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1457 transitions. [2022-01-18 15:25:05,619 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1457 transitions. Word has length 22 [2022-01-18 15:25:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:05,619 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1457 transitions. [2022-01-18 15:25:05,619 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) [2022-01-18 15:25:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1457 transitions. [2022-01-18 15:25:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:05,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:05,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:05,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:05,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:05,847 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash -180315899, now seen corresponding path program 141 times [2022-01-18 15:25:05,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:05,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104511472] [2022-01-18 15:25:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:05,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:05,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104511472] [2022-01-18 15:25:05,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104511472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619056389] [2022-01-18 15:25:05,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:05,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:05,916 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) [2022-01-18 15:25:05,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:25:06,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:06,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:06,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:06,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:06,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:06,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:06,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:06,552 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:06,552 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 [2022-01-18 15:25:06,555 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 [2022-01-18 15:25:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:06,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619056389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:06,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:06,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:06,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065254509] [2022-01-18 15:25:06,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:06,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:06,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:06,559 INFO L87 Difference]: Start difference. First operand 483 states and 1457 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) [2022-01-18 15:25:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:06,933 INFO L93 Difference]: Finished difference Result 663 states and 1977 transitions. [2022-01-18 15:25:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:06,934 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 [2022-01-18 15:25:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:06,935 INFO L225 Difference]: With dead ends: 663 [2022-01-18 15:25:06,935 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 15:25:06,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:25:06,935 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:06,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 223 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 15:25:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 480. [2022-01-18 15:25:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.022964509394572) internal successors, (1448), 479 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1448 transitions. [2022-01-18 15:25:06,940 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1448 transitions. Word has length 22 [2022-01-18 15:25:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:06,940 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1448 transitions. [2022-01-18 15:25:06,941 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) [2022-01-18 15:25:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1448 transitions. [2022-01-18 15:25:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:06,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:06,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:06,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 15:25:07,155 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,SelfDestructingSolverStorable157 [2022-01-18 15:25:07,155 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 325901489, now seen corresponding path program 142 times [2022-01-18 15:25:07,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375897149] [2022-01-18 15:25:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:07,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:07,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:07,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375897149] [2022-01-18 15:25:07,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375897149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:07,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769029002] [2022-01-18 15:25:07,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:07,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:07,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:07,255 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) [2022-01-18 15:25:07,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:25:07,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:07,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:07,504 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 29 treesize of output 23 [2022-01-18 15:25:07,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:07,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:07,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:07,847 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 18 treesize of output 22 [2022-01-18 15:25:07,926 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:07,926 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 [2022-01-18 15:25:07,928 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 [2022-01-18 15:25:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:07,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769029002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:07,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:07,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:07,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099721839] [2022-01-18 15:25:07,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:07,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:07,933 INFO L87 Difference]: Start difference. First operand 480 states and 1448 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) [2022-01-18 15:25:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:08,366 INFO L93 Difference]: Finished difference Result 709 states and 2062 transitions. [2022-01-18 15:25:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:25:08,366 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 [2022-01-18 15:25:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:08,367 INFO L225 Difference]: With dead ends: 709 [2022-01-18 15:25:08,367 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 15:25:08,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:25:08,367 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 202 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:08,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 218 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 15:25:08,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 480. [2022-01-18 15:25:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.022964509394572) internal successors, (1448), 479 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1448 transitions. [2022-01-18 15:25:08,373 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1448 transitions. Word has length 22 [2022-01-18 15:25:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:08,373 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1448 transitions. [2022-01-18 15:25:08,373 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) [2022-01-18 15:25:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1448 transitions. [2022-01-18 15:25:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:08,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:08,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:08,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:08,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 15:25:08,583 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1750927815, now seen corresponding path program 143 times [2022-01-18 15:25:08,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581571554] [2022-01-18 15:25:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:08,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:08,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581571554] [2022-01-18 15:25:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581571554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533672543] [2022-01-18 15:25:08,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:08,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:08,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:08,646 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) [2022-01-18 15:25:08,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:25:08,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:08,875 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 29 treesize of output 23 [2022-01-18 15:25:08,943 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 20 treesize of output 14 [2022-01-18 15:25:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:08,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:09,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:09,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:09,096 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:09,096 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 [2022-01-18 15:25:09,098 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 [2022-01-18 15:25:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:09,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533672543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:09,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:09,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:09,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844044993] [2022-01-18 15:25:09,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:09,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:09,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:09,101 INFO L87 Difference]: Start difference. First operand 480 states and 1448 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) [2022-01-18 15:25:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:09,483 INFO L93 Difference]: Finished difference Result 694 states and 2024 transitions. [2022-01-18 15:25:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:09,483 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 [2022-01-18 15:25:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:09,484 INFO L225 Difference]: With dead ends: 694 [2022-01-18 15:25:09,484 INFO L226 Difference]: Without dead ends: 685 [2022-01-18 15:25:09,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:25:09,484 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:09,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 212 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-18 15:25:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 488. [2022-01-18 15:25:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0102669404517455) internal successors, (1466), 487 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1466 transitions. [2022-01-18 15:25:09,490 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1466 transitions. Word has length 22 [2022-01-18 15:25:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:09,490 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1466 transitions. [2022-01-18 15:25:09,490 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) [2022-01-18 15:25:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1466 transitions. [2022-01-18 15:25:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:09,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:09,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:09,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:09,694 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,SelfDestructingSolverStorable159 [2022-01-18 15:25:09,694 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1786527141, now seen corresponding path program 144 times [2022-01-18 15:25:09,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917786775] [2022-01-18 15:25:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:09,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917786775] [2022-01-18 15:25:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917786775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961830150] [2022-01-18 15:25:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:09,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:09,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:09,791 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) [2022-01-18 15:25:09,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:25:09,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:09,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:09,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:09,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:09,973 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 29 treesize of output 23 [2022-01-18 15:25:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:10,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:10,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:10,284 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 18 treesize of output 22 [2022-01-18 15:25:10,354 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:10,355 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 8 treesize of output 7 [2022-01-18 15:25:10,357 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 [2022-01-18 15:25:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961830150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:10,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:10,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:10,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381140885] [2022-01-18 15:25:10,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:10,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:10,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:10,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:10,362 INFO L87 Difference]: Start difference. First operand 488 states and 1466 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) [2022-01-18 15:25:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:10,748 INFO L93 Difference]: Finished difference Result 619 states and 1842 transitions. [2022-01-18 15:25:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:10,749 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 [2022-01-18 15:25:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:10,749 INFO L225 Difference]: With dead ends: 619 [2022-01-18 15:25:10,749 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 15:25:10,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:25:10,750 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:10,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 232 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 15:25:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 458. [2022-01-18 15:25:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.008752735229759) internal successors, (1375), 457 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1375 transitions. [2022-01-18 15:25:10,755 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1375 transitions. Word has length 22 [2022-01-18 15:25:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:10,755 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1375 transitions. [2022-01-18 15:25:10,755 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) [2022-01-18 15:25:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1375 transitions. [2022-01-18 15:25:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:10,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:10,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:10,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:10,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:10,958 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:10,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1957780507, now seen corresponding path program 145 times [2022-01-18 15:25:10,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:10,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831439876] [2022-01-18 15:25:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:10,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:11,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:11,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831439876] [2022-01-18 15:25:11,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831439876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:11,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543438031] [2022-01-18 15:25:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:11,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:11,016 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) [2022-01-18 15:25:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:25:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:11,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:11,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:11,225 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 50 treesize of output 40 [2022-01-18 15:25:11,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:11,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:11,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:11,501 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:25:11,578 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:11,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:11,580 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 [2022-01-18 15:25:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:11,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543438031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:11,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:11,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:11,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061056208] [2022-01-18 15:25:11,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:11,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:11,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:11,583 INFO L87 Difference]: Start difference. First operand 458 states and 1375 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) [2022-01-18 15:25:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:11,897 INFO L93 Difference]: Finished difference Result 928 states and 2712 transitions. [2022-01-18 15:25:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:11,897 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 [2022-01-18 15:25:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:11,898 INFO L225 Difference]: With dead ends: 928 [2022-01-18 15:25:11,898 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 15:25:11,898 INFO L932 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 [2022-01-18 15:25:11,899 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:11,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 233 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 15:25:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 478. [2022-01-18 15:25:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.050314465408805) internal successors, (1455), 477 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1455 transitions. [2022-01-18 15:25:11,905 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1455 transitions. Word has length 22 [2022-01-18 15:25:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:11,905 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1455 transitions. [2022-01-18 15:25:11,905 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) [2022-01-18 15:25:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1455 transitions. [2022-01-18 15:25:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:11,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:11,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:11,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:12,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:12,122 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash -463177543, now seen corresponding path program 146 times [2022-01-18 15:25:12,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:12,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990334118] [2022-01-18 15:25:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:12,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:12,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:12,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990334118] [2022-01-18 15:25:12,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990334118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:12,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038049123] [2022-01-18 15:25:12,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:12,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:12,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:12,186 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) [2022-01-18 15:25:12,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:25:12,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:12,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:12,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:12,403 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 50 treesize of output 40 [2022-01-18 15:25:12,567 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 31 treesize of output 23 [2022-01-18 15:25:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:12,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:12,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:12,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:12,787 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:12,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:12,789 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 [2022-01-18 15:25:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:12,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038049123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:12,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:12,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:12,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792469211] [2022-01-18 15:25:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:12,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:12,792 INFO L87 Difference]: Start difference. First operand 478 states and 1455 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) [2022-01-18 15:25:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:13,179 INFO L93 Difference]: Finished difference Result 940 states and 2734 transitions. [2022-01-18 15:25:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:25:13,179 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 [2022-01-18 15:25:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:13,180 INFO L225 Difference]: With dead ends: 940 [2022-01-18 15:25:13,180 INFO L226 Difference]: Without dead ends: 930 [2022-01-18 15:25:13,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:25:13,180 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 252 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:13,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 177 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-18 15:25:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 475. [2022-01-18 15:25:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.0443037974683542) internal successors, (1443), 474 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1443 transitions. [2022-01-18 15:25:13,187 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1443 transitions. Word has length 22 [2022-01-18 15:25:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:13,187 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1443 transitions. [2022-01-18 15:25:13,187 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) [2022-01-18 15:25:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1443 transitions. [2022-01-18 15:25:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:13,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:13,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:13,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:13,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:13,404 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -38230333, now seen corresponding path program 147 times [2022-01-18 15:25:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:13,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412634632] [2022-01-18 15:25:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:13,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:13,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412634632] [2022-01-18 15:25:13,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412634632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342265425] [2022-01-18 15:25:13,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:13,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:13,450 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) [2022-01-18 15:25:13,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:25:13,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:13,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:13,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:13,658 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 [2022-01-18 15:25:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:13,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:13,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:13,847 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 47 treesize of output 45 [2022-01-18 15:25:13,926 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:13,927 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 8 treesize of output 7 [2022-01-18 15:25:13,928 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 [2022-01-18 15:25:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:13,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342265425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:13,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:13,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:13,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608680999] [2022-01-18 15:25:13,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:13,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:13,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:13,931 INFO L87 Difference]: Start difference. First operand 475 states and 1443 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) [2022-01-18 15:25:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:14,325 INFO L93 Difference]: Finished difference Result 925 states and 2704 transitions. [2022-01-18 15:25:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:25:14,326 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 [2022-01-18 15:25:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:14,327 INFO L225 Difference]: With dead ends: 925 [2022-01-18 15:25:14,327 INFO L226 Difference]: Without dead ends: 905 [2022-01-18 15:25:14,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:25:14,327 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 185 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:14,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 229 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-01-18 15:25:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 472. [2022-01-18 15:25:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.038216560509554) internal successors, (1431), 471 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1431 transitions. [2022-01-18 15:25:14,333 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1431 transitions. Word has length 22 [2022-01-18 15:25:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:14,333 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1431 transitions. [2022-01-18 15:25:14,333 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) [2022-01-18 15:25:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1431 transitions. [2022-01-18 15:25:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:14,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:14,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:14,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:14,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:14,540 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1733366227, now seen corresponding path program 148 times [2022-01-18 15:25:14,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005081584] [2022-01-18 15:25:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:14,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:14,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005081584] [2022-01-18 15:25:14,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005081584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900888113] [2022-01-18 15:25:14,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:14,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:14,614 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) [2022-01-18 15:25:14,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:25:14,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:14,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:14,807 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 50 treesize of output 40 [2022-01-18 15:25:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:14,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:15,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:15,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:15,145 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:15,145 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 [2022-01-18 15:25:15,147 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 [2022-01-18 15:25:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:15,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900888113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:15,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:15,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:15,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678217452] [2022-01-18 15:25:15,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:15,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:15,150 INFO L87 Difference]: Start difference. First operand 472 states and 1431 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) [2022-01-18 15:25:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:15,430 INFO L93 Difference]: Finished difference Result 934 states and 2699 transitions. [2022-01-18 15:25:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:15,430 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 [2022-01-18 15:25:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:15,431 INFO L225 Difference]: With dead ends: 934 [2022-01-18 15:25:15,432 INFO L226 Difference]: Without dead ends: 898 [2022-01-18 15:25:15,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:25:15,432 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:15,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 247 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-18 15:25:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 466. [2022-01-18 15:25:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0258064516129033) internal successors, (1407), 465 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1407 transitions. [2022-01-18 15:25:15,438 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1407 transitions. Word has length 22 [2022-01-18 15:25:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:15,438 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1407 transitions. [2022-01-18 15:25:15,438 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) [2022-01-18 15:25:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1407 transitions. [2022-01-18 15:25:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:15,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:15,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:15,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:15,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:15,655 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash -257969397, now seen corresponding path program 149 times [2022-01-18 15:25:15,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111167622] [2022-01-18 15:25:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:15,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:15,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:15,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111167622] [2022-01-18 15:25:15,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111167622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:15,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435850384] [2022-01-18 15:25:15,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:15,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:15,731 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) [2022-01-18 15:25:15,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:25:15,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:15,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:16,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:16,047 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 35 treesize of output 27 [2022-01-18 15:25:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:16,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:16,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:16,189 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 47 treesize of output 45 [2022-01-18 15:25:16,271 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:16,271 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 8 treesize of output 7 [2022-01-18 15:25:16,273 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 [2022-01-18 15:25:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:16,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435850384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:16,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:16,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:16,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862969444] [2022-01-18 15:25:16,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:16,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:16,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:16,276 INFO L87 Difference]: Start difference. First operand 466 states and 1407 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) [2022-01-18 15:25:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:16,534 INFO L93 Difference]: Finished difference Result 831 states and 2435 transitions. [2022-01-18 15:25:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:16,534 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 [2022-01-18 15:25:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:16,535 INFO L225 Difference]: With dead ends: 831 [2022-01-18 15:25:16,535 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 15:25:16,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:25:16,536 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 221 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:16,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 165 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 15:25:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 474. [2022-01-18 15:25:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.044397463002114) internal successors, (1440), 473 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1440 transitions. [2022-01-18 15:25:16,542 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1440 transitions. Word has length 22 [2022-01-18 15:25:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:16,542 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1440 transitions. [2022-01-18 15:25:16,543 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) [2022-01-18 15:25:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1440 transitions. [2022-01-18 15:25:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:16,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:16,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:16,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:16,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:16,744 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1236633567, now seen corresponding path program 150 times [2022-01-18 15:25:16,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:16,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649373408] [2022-01-18 15:25:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:16,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:16,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649373408] [2022-01-18 15:25:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649373408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125160933] [2022-01-18 15:25:16,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:16,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:16,872 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) [2022-01-18 15:25:16,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:25:17,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:25:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:17,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:17,314 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 39 treesize of output 31 [2022-01-18 15:25:17,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:17,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:17,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:17,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:17,621 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:17,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:17,623 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 [2022-01-18 15:25:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:17,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125160933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:17,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:17,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:17,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341923507] [2022-01-18 15:25:17,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:17,628 INFO L87 Difference]: Start difference. First operand 474 states and 1440 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) [2022-01-18 15:25:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:18,388 INFO L93 Difference]: Finished difference Result 911 states and 2660 transitions. [2022-01-18 15:25:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:25:18,388 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 [2022-01-18 15:25:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:18,389 INFO L225 Difference]: With dead ends: 911 [2022-01-18 15:25:18,389 INFO L226 Difference]: Without dead ends: 901 [2022-01-18 15:25:18,389 INFO L932 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 [2022-01-18 15:25:18,390 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 259 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:18,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 245 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-01-18 15:25:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 471. [2022-01-18 15:25:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0382978723404257) internal successors, (1428), 470 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1428 transitions. [2022-01-18 15:25:18,396 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1428 transitions. Word has length 22 [2022-01-18 15:25:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:18,396 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1428 transitions. [2022-01-18 15:25:18,396 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) [2022-01-18 15:25:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1428 transitions. [2022-01-18 15:25:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:18,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:18,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:18,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:18,607 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,SelfDestructingSolverStorable166 [2022-01-18 15:25:18,607 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1661580777, now seen corresponding path program 151 times [2022-01-18 15:25:18,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954936788] [2022-01-18 15:25:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:18,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:18,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954936788] [2022-01-18 15:25:18,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954936788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982435014] [2022-01-18 15:25:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:18,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:18,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:18,665 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) [2022-01-18 15:25:18,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:25:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:18,887 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 [2022-01-18 15:25:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:19,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:19,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:19,105 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 [2022-01-18 15:25:19,179 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:19,179 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 8 treesize of output 7 [2022-01-18 15:25:19,181 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 [2022-01-18 15:25:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:19,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982435014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:19,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:19,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:19,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735357501] [2022-01-18 15:25:19,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:19,184 INFO L87 Difference]: Start difference. First operand 471 states and 1428 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) [2022-01-18 15:25:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:19,571 INFO L93 Difference]: Finished difference Result 840 states and 2457 transitions. [2022-01-18 15:25:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:25:19,571 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 [2022-01-18 15:25:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:19,572 INFO L225 Difference]: With dead ends: 840 [2022-01-18 15:25:19,572 INFO L226 Difference]: Without dead ends: 820 [2022-01-18 15:25:19,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:25:19,573 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:19,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 236 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-18 15:25:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 468. [2022-01-18 15:25:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.032119914346895) internal successors, (1416), 467 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1416 transitions. [2022-01-18 15:25:19,579 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1416 transitions. Word has length 22 [2022-01-18 15:25:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:19,579 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1416 transitions. [2022-01-18 15:25:19,579 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) [2022-01-18 15:25:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1416 transitions. [2022-01-18 15:25:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:19,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:19,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:19,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:19,793 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,SelfDestructingSolverStorable167 [2022-01-18 15:25:19,793 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1038642111, now seen corresponding path program 152 times [2022-01-18 15:25:19,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:19,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421596730] [2022-01-18 15:25:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:19,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:19,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421596730] [2022-01-18 15:25:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421596730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030681441] [2022-01-18 15:25:19,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:19,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:19,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:19,871 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) [2022-01-18 15:25:19,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:25:19,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:20,067 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 50 treesize of output 40 [2022-01-18 15:25:20,235 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 44 treesize of output 36 [2022-01-18 15:25:20,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:20,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:20,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:20,479 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 47 treesize of output 45 [2022-01-18 15:25:20,598 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:20,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:20,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:20,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030681441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:20,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:20,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:20,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097791121] [2022-01-18 15:25:20,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:20,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:20,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:20,606 INFO L87 Difference]: Start difference. First operand 468 states and 1416 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) [2022-01-18 15:25:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:21,148 INFO L93 Difference]: Finished difference Result 949 states and 2771 transitions. [2022-01-18 15:25:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:25:21,148 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 [2022-01-18 15:25:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:21,149 INFO L225 Difference]: With dead ends: 949 [2022-01-18 15:25:21,149 INFO L226 Difference]: Without dead ends: 949 [2022-01-18 15:25:21,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:25:21,150 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 228 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:21,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 236 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-18 15:25:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 478. [2022-01-18 15:25:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0670859538784065) internal successors, (1463), 477 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1463 transitions. [2022-01-18 15:25:21,156 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1463 transitions. Word has length 22 [2022-01-18 15:25:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:21,156 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1463 transitions. [2022-01-18 15:25:21,156 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) [2022-01-18 15:25:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1463 transitions. [2022-01-18 15:25:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:21,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:21,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:21,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 15:25:21,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 15:25:21,357 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1761722221, now seen corresponding path program 153 times [2022-01-18 15:25:21,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:21,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544502989] [2022-01-18 15:25:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:21,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:21,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:21,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544502989] [2022-01-18 15:25:21,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544502989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:21,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633897011] [2022-01-18 15:25:21,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:21,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:21,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:21,453 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) [2022-01-18 15:25:21,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:25:21,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:21,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:21,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:21,831 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 44 treesize of output 36 [2022-01-18 15:25:21,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:21,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:22,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:22,047 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 47 treesize of output 45 [2022-01-18 15:25:22,178 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:22,178 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 [2022-01-18 15:25:22,180 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 [2022-01-18 15:25:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:22,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633897011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:22,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:22,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:22,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732545750] [2022-01-18 15:25:22,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:22,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:22,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:22,184 INFO L87 Difference]: Start difference. First operand 478 states and 1463 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) [2022-01-18 15:25:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:23,100 INFO L93 Difference]: Finished difference Result 1028 states and 2983 transitions. [2022-01-18 15:25:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:25:23,101 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 [2022-01-18 15:25:23,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:23,102 INFO L225 Difference]: With dead ends: 1028 [2022-01-18 15:25:23,102 INFO L226 Difference]: Without dead ends: 1018 [2022-01-18 15:25:23,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:25:23,102 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 317 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:23,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 270 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-01-18 15:25:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 485. [2022-01-18 15:25:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.0516528925619837) internal successors, (1477), 484 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1477 transitions. [2022-01-18 15:25:23,109 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1477 transitions. Word has length 22 [2022-01-18 15:25:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:23,109 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1477 transitions. [2022-01-18 15:25:23,109 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) [2022-01-18 15:25:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1477 transitions. [2022-01-18 15:25:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:23,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:23,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:23,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:23,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:23,326 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:23,326 INFO L85 PathProgramCache]: Analyzing trace with hash -720647029, now seen corresponding path program 154 times [2022-01-18 15:25:23,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:23,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180413540] [2022-01-18 15:25:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:23,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:23,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180413540] [2022-01-18 15:25:23,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180413540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560161934] [2022-01-18 15:25:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:23,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:23,411 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) [2022-01-18 15:25:23,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:25:23,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:23,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:23,829 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 44 treesize of output 36 [2022-01-18 15:25:23,830 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 40 treesize of output 32 [2022-01-18 15:25:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:23,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:24,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:24,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:24,177 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:24,178 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 [2022-01-18 15:25:24,181 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 [2022-01-18 15:25:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:24,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560161934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:24,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:24,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:24,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500406426] [2022-01-18 15:25:24,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:24,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:24,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:24,187 INFO L87 Difference]: Start difference. First operand 485 states and 1477 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) [2022-01-18 15:25:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:24,681 INFO L93 Difference]: Finished difference Result 957 states and 2766 transitions. [2022-01-18 15:25:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:25:24,681 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 [2022-01-18 15:25:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:24,683 INFO L225 Difference]: With dead ends: 957 [2022-01-18 15:25:24,684 INFO L226 Difference]: Without dead ends: 957 [2022-01-18 15:25:24,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:25:24,684 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 189 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:24,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 213 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-18 15:25:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 462. [2022-01-18 15:25:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.013015184381779) internal successors, (1389), 461 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1389 transitions. [2022-01-18 15:25:24,690 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1389 transitions. Word has length 22 [2022-01-18 15:25:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:24,690 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1389 transitions. [2022-01-18 15:25:24,690 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) [2022-01-18 15:25:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1389 transitions. [2022-01-18 15:25:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:24,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:24,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:24,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:24,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:24,894 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1497490963, now seen corresponding path program 155 times [2022-01-18 15:25:24,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:24,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40121729] [2022-01-18 15:25:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:24,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:24,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:24,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40121729] [2022-01-18 15:25:24,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40121729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:24,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601871125] [2022-01-18 15:25:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:24,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:24,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:24,975 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) [2022-01-18 15:25:24,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:25:25,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:25:25,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:25,218 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 50 treesize of output 40 [2022-01-18 15:25:25,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:25,320 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 43 treesize of output 35 [2022-01-18 15:25:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:25,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:25,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:25,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:25,515 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:25,515 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 8 treesize of output 7 [2022-01-18 15:25:25,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:25,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601871125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:25,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:25,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:25,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860058813] [2022-01-18 15:25:25,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:25,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:25,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:25,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:25,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:25,520 INFO L87 Difference]: Start difference. First operand 462 states and 1389 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) [2022-01-18 15:25:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:25,848 INFO L93 Difference]: Finished difference Result 881 states and 2550 transitions. [2022-01-18 15:25:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:25,848 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 [2022-01-18 15:25:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:25,850 INFO L225 Difference]: With dead ends: 881 [2022-01-18 15:25:25,850 INFO L226 Difference]: Without dead ends: 872 [2022-01-18 15:25:25,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:25:25,850 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 171 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:25,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 230 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-18 15:25:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 482. [2022-01-18 15:25:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.043659043659044) internal successors, (1464), 481 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1464 transitions. [2022-01-18 15:25:25,856 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1464 transitions. Word has length 22 [2022-01-18 15:25:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1464 transitions. [2022-01-18 15:25:25,856 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) [2022-01-18 15:25:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1464 transitions. [2022-01-18 15:25:25,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:25,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:25,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:25,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:26,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:26,089 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1839740457, now seen corresponding path program 156 times [2022-01-18 15:25:26,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:26,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110481504] [2022-01-18 15:25:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:26,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:26,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110481504] [2022-01-18 15:25:26,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110481504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427475683] [2022-01-18 15:25:26,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:26,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:26,187 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) [2022-01-18 15:25:26,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:25:26,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:26,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:26,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:26,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:26,446 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 50 treesize of output 40 [2022-01-18 15:25:26,647 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 45 treesize of output 37 [2022-01-18 15:25:26,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:26,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:26,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:26,837 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 42 treesize of output 40 [2022-01-18 15:25:26,934 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:26,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:26,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:26,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427475683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:26,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:26,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:26,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251172026] [2022-01-18 15:25:26,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:26,941 INFO L87 Difference]: Start difference. First operand 482 states and 1464 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) [2022-01-18 15:25:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:27,946 INFO L93 Difference]: Finished difference Result 1003 states and 2854 transitions. [2022-01-18 15:25:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:25:27,947 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 [2022-01-18 15:25:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:27,948 INFO L225 Difference]: With dead ends: 1003 [2022-01-18 15:25:27,948 INFO L226 Difference]: Without dead ends: 993 [2022-01-18 15:25:27,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:25:27,948 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 268 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:27,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 249 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-18 15:25:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 504. [2022-01-18 15:25:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0377733598409544) internal successors, (1528), 503 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1528 transitions. [2022-01-18 15:25:27,955 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1528 transitions. Word has length 22 [2022-01-18 15:25:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:27,955 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1528 transitions. [2022-01-18 15:25:27,955 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) [2022-01-18 15:25:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1528 transitions. [2022-01-18 15:25:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:27,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:27,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:27,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:28,170 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,SelfDestructingSolverStorable172 [2022-01-18 15:25:28,170 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 258968541, now seen corresponding path program 157 times [2022-01-18 15:25:28,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975130144] [2022-01-18 15:25:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:28,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:28,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:28,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975130144] [2022-01-18 15:25:28,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975130144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:28,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124641623] [2022-01-18 15:25:28,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:28,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:28,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:28,224 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) [2022-01-18 15:25:28,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:25:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:28,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:28,552 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 45 treesize of output 35 [2022-01-18 15:25:28,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:28,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:28,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:28,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:28,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:28,778 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 8 treesize of output 7 [2022-01-18 15:25:28,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:28,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124641623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:28,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:28,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:28,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907918481] [2022-01-18 15:25:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:28,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:28,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:28,784 INFO L87 Difference]: Start difference. First operand 504 states and 1528 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) [2022-01-18 15:25:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:29,447 INFO L93 Difference]: Finished difference Result 960 states and 2743 transitions. [2022-01-18 15:25:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:25:29,447 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 [2022-01-18 15:25:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:29,448 INFO L225 Difference]: With dead ends: 960 [2022-01-18 15:25:29,448 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 15:25:29,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:25:29,449 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:29,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 252 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 15:25:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 484. [2022-01-18 15:25:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.039337474120083) internal successors, (1468), 483 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1468 transitions. [2022-01-18 15:25:29,455 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1468 transitions. Word has length 22 [2022-01-18 15:25:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:29,455 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1468 transitions. [2022-01-18 15:25:29,455 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) [2022-01-18 15:25:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1468 transitions. [2022-01-18 15:25:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:29,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:29,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:29,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:29,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:29,672 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1637774099, now seen corresponding path program 158 times [2022-01-18 15:25:29,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:29,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346239734] [2022-01-18 15:25:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:29,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:29,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:29,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346239734] [2022-01-18 15:25:29,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346239734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:29,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157683607] [2022-01-18 15:25:29,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:29,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:29,742 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) [2022-01-18 15:25:29,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:25:29,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:29,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:29,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:29,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:29,984 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 50 treesize of output 40 [2022-01-18 15:25:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:30,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:30,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:30,298 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 47 treesize of output 45 [2022-01-18 15:25:30,432 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:30,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:30,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:30,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157683607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:30,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:30,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:30,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303939992] [2022-01-18 15:25:30,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:30,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:30,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:30,439 INFO L87 Difference]: Start difference. First operand 484 states and 1468 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) [2022-01-18 15:25:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:30,931 INFO L93 Difference]: Finished difference Result 829 states and 2424 transitions. [2022-01-18 15:25:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:25:30,932 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 [2022-01-18 15:25:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:30,933 INFO L225 Difference]: With dead ends: 829 [2022-01-18 15:25:30,933 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 15:25:30,933 INFO L932 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 [2022-01-18 15:25:30,933 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:30,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 224 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 15:25:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 490. [2022-01-18 15:25:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.0286298568507157) internal successors, (1481), 489 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1481 transitions. [2022-01-18 15:25:30,939 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1481 transitions. Word has length 22 [2022-01-18 15:25:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:30,939 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1481 transitions. [2022-01-18 15:25:30,939 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) [2022-01-18 15:25:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1481 transitions. [2022-01-18 15:25:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:30,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:30,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:30,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:31,145 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash -121515041, now seen corresponding path program 159 times [2022-01-18 15:25:31,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:31,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288659821] [2022-01-18 15:25:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:31,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288659821] [2022-01-18 15:25:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288659821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355345137] [2022-01-18 15:25:31,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:31,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:31,216 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) [2022-01-18 15:25:31,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:25:31,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:25:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:31,465 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 50 treesize of output 40 [2022-01-18 15:25:31,585 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 28 treesize of output 22 [2022-01-18 15:25:31,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:25:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:31,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:31,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:31,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:31,862 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:31,862 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:25:31,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:31,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355345137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:31,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:31,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:31,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827958755] [2022-01-18 15:25:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:31,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:31,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:31,870 INFO L87 Difference]: Start difference. First operand 490 states and 1481 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) [2022-01-18 15:25:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:32,485 INFO L93 Difference]: Finished difference Result 907 states and 2602 transitions. [2022-01-18 15:25:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:25:32,485 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 [2022-01-18 15:25:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:32,487 INFO L225 Difference]: With dead ends: 907 [2022-01-18 15:25:32,487 INFO L226 Difference]: Without dead ends: 897 [2022-01-18 15:25:32,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:25:32,487 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 204 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 267 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 [2022-01-18 15:25:32,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 267 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-18 15:25:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 512. [2022-01-18 15:25:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.0234833659491196) internal successors, (1545), 511 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1545 transitions. [2022-01-18 15:25:32,493 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1545 transitions. Word has length 22 [2022-01-18 15:25:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:32,493 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1545 transitions. [2022-01-18 15:25:32,493 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) [2022-01-18 15:25:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1545 transitions. [2022-01-18 15:25:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:32,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:32,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:32,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 15:25:32,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:32,710 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1702286957, now seen corresponding path program 160 times [2022-01-18 15:25:32,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:32,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201674676] [2022-01-18 15:25:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:32,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:32,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201674676] [2022-01-18 15:25:32,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201674676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:32,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004392318] [2022-01-18 15:25:32,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:32,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:32,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:32,788 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) [2022-01-18 15:25:32,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:25:32,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:32,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:33,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:33,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:33,232 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 26 treesize of output 20 [2022-01-18 15:25:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:33,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:33,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:33,389 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 47 treesize of output 45 [2022-01-18 15:25:33,466 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:33,466 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 8 treesize of output 7 [2022-01-18 15:25:33,468 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 [2022-01-18 15:25:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:33,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004392318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:33,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:33,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:33,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223889208] [2022-01-18 15:25:33,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:33,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:33,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:33,471 INFO L87 Difference]: Start difference. First operand 512 states and 1545 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) [2022-01-18 15:25:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:33,784 INFO L93 Difference]: Finished difference Result 864 states and 2491 transitions. [2022-01-18 15:25:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:25:33,784 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 [2022-01-18 15:25:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:33,785 INFO L225 Difference]: With dead ends: 864 [2022-01-18 15:25:33,785 INFO L226 Difference]: Without dead ends: 849 [2022-01-18 15:25:33,785 INFO L932 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 [2022-01-18 15:25:33,786 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 181 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:33,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 181 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-18 15:25:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 486. [2022-01-18 15:25:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0350515463917525) internal successors, (1472), 485 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1472 transitions. [2022-01-18 15:25:33,792 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1472 transitions. Word has length 22 [2022-01-18 15:25:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:33,792 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1472 transitions. [2022-01-18 15:25:33,792 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) [2022-01-18 15:25:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1472 transitions. [2022-01-18 15:25:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:33,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:33,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:33,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:34,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:34,009 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash 995359209, now seen corresponding path program 161 times [2022-01-18 15:25:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866179190] [2022-01-18 15:25:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:34,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:34,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866179190] [2022-01-18 15:25:34,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866179190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892623258] [2022-01-18 15:25:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:34,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:34,072 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) [2022-01-18 15:25:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:25:34,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:34,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:34,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:34,314 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 50 treesize of output 40 [2022-01-18 15:25:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:34,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:34,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:34,598 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 42 treesize of output 40 [2022-01-18 15:25:34,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:34,703 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:25:34,705 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 [2022-01-18 15:25:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:34,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892623258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:34,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:34,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:34,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560383196] [2022-01-18 15:25:34,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:34,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:34,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:34,709 INFO L87 Difference]: Start difference. First operand 486 states and 1472 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) [2022-01-18 15:25:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:35,135 INFO L93 Difference]: Finished difference Result 845 states and 2446 transitions. [2022-01-18 15:25:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:35,136 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 [2022-01-18 15:25:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:35,137 INFO L225 Difference]: With dead ends: 845 [2022-01-18 15:25:35,137 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 15:25:35,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:25:35,137 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 213 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:35,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 15:25:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 496. [2022-01-18 15:25:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.0161616161616163) internal successors, (1493), 495 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1493 transitions. [2022-01-18 15:25:35,143 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1493 transitions. Word has length 22 [2022-01-18 15:25:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:35,143 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1493 transitions. [2022-01-18 15:25:35,143 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) [2022-01-18 15:25:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1493 transitions. [2022-01-18 15:25:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:35,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:35,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:35,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:35,345 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,SelfDestructingSolverStorable177 [2022-01-18 15:25:35,345 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1582207485, now seen corresponding path program 162 times [2022-01-18 15:25:35,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:35,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323878333] [2022-01-18 15:25:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:35,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:35,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:35,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323878333] [2022-01-18 15:25:35,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323878333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:35,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319803129] [2022-01-18 15:25:35,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:35,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:35,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:35,416 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) [2022-01-18 15:25:35,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:25:35,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:35,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:35,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:35,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:35,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:35,937 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 42 treesize of output 40 [2022-01-18 15:25:36,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:36,003 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:25:36,004 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 [2022-01-18 15:25:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:36,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319803129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:36,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:36,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:36,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498046107] [2022-01-18 15:25:36,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:36,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:36,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:36,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:36,008 INFO L87 Difference]: Start difference. First operand 496 states and 1493 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) [2022-01-18 15:25:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:36,495 INFO L93 Difference]: Finished difference Result 789 states and 2296 transitions. [2022-01-18 15:25:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:36,495 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 [2022-01-18 15:25:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:36,496 INFO L225 Difference]: With dead ends: 789 [2022-01-18 15:25:36,496 INFO L226 Difference]: Without dead ends: 769 [2022-01-18 15:25:36,496 INFO L932 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 [2022-01-18 15:25:36,497 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:36,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 244 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:36,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-18 15:25:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 502. [2022-01-18 15:25:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.0059880239520957) internal successors, (1506), 501 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1506 transitions. [2022-01-18 15:25:36,502 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1506 transitions. Word has length 22 [2022-01-18 15:25:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:36,503 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1506 transitions. [2022-01-18 15:25:36,503 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) [2022-01-18 15:25:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1506 transitions. [2022-01-18 15:25:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:36,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:36,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:36,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 15:25:36,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:36,705 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash 953470671, now seen corresponding path program 163 times [2022-01-18 15:25:36,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:36,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839144185] [2022-01-18 15:25:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:36,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:36,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839144185] [2022-01-18 15:25:36,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839144185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580895486] [2022-01-18 15:25:36,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:36,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:36,757 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) [2022-01-18 15:25:36,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:25:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:36,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:37,018 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 50 treesize of output 40 [2022-01-18 15:25:37,162 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 28 treesize of output 22 [2022-01-18 15:25:37,164 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 26 treesize of output 20 [2022-01-18 15:25:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:37,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:37,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:37,305 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 47 treesize of output 45 [2022-01-18 15:25:37,422 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:37,423 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 [2022-01-18 15:25:37,425 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 [2022-01-18 15:25:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:37,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580895486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:37,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:37,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:37,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048354751] [2022-01-18 15:25:37,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:37,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:37,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:37,431 INFO L87 Difference]: Start difference. First operand 502 states and 1506 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) [2022-01-18 15:25:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:37,907 INFO L93 Difference]: Finished difference Result 834 states and 2385 transitions. [2022-01-18 15:25:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:25:37,907 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 [2022-01-18 15:25:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:37,908 INFO L225 Difference]: With dead ends: 834 [2022-01-18 15:25:37,909 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 15:25:37,909 INFO L932 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 [2022-01-18 15:25:37,909 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:37,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 228 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 15:25:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 489. [2022-01-18 15:25:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.026639344262295) internal successors, (1477), 488 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1477 transitions. [2022-01-18 15:25:37,915 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1477 transitions. Word has length 22 [2022-01-18 15:25:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:37,915 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1477 transitions. [2022-01-18 15:25:37,915 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) [2022-01-18 15:25:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1477 transitions. [2022-01-18 15:25:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:37,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:37,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:37,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:38,117 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,SelfDestructingSolverStorable179 [2022-01-18 15:25:38,117 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash 836691451, now seen corresponding path program 164 times [2022-01-18 15:25:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:38,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774262025] [2022-01-18 15:25:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:38,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:38,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:38,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774262025] [2022-01-18 15:25:38,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774262025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:38,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031369259] [2022-01-18 15:25:38,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:38,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:38,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:38,197 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) [2022-01-18 15:25:38,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:25:38,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:38,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:38,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:38,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:38,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:38,850 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:38,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:38,853 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 [2022-01-18 15:25:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031369259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:38,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:38,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471886887] [2022-01-18 15:25:38,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:38,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:38,857 INFO L87 Difference]: Start difference. First operand 489 states and 1477 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) [2022-01-18 15:25:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:39,231 INFO L93 Difference]: Finished difference Result 812 states and 2359 transitions. [2022-01-18 15:25:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:39,232 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 [2022-01-18 15:25:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:39,233 INFO L225 Difference]: With dead ends: 812 [2022-01-18 15:25:39,233 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 15:25:39,233 INFO L932 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 [2022-01-18 15:25:39,233 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:39,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 203 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 15:25:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 498. [2022-01-18 15:25:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.0181086519114686) internal successors, (1500), 497 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1500 transitions. [2022-01-18 15:25:39,239 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1500 transitions. Word has length 22 [2022-01-18 15:25:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:39,239 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1500 transitions. [2022-01-18 15:25:39,239 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) [2022-01-18 15:25:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1500 transitions. [2022-01-18 15:25:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:39,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:39,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:39,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:39,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:39,449 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1963672881, now seen corresponding path program 165 times [2022-01-18 15:25:39,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664046528] [2022-01-18 15:25:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:39,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:39,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:39,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664046528] [2022-01-18 15:25:39,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664046528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:39,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542868069] [2022-01-18 15:25:39,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:39,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:39,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:39,528 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) [2022-01-18 15:25:39,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:25:39,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:39,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:39,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:39,887 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 31 treesize of output 23 [2022-01-18 15:25:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:40,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:40,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:40,181 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:40,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:40,184 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 [2022-01-18 15:25:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542868069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:40,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:40,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:40,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962937619] [2022-01-18 15:25:40,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:40,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:40,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:40,188 INFO L87 Difference]: Start difference. First operand 498 states and 1500 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) [2022-01-18 15:25:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:40,772 INFO L93 Difference]: Finished difference Result 824 states and 2378 transitions. [2022-01-18 15:25:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:25:40,772 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 [2022-01-18 15:25:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:40,773 INFO L225 Difference]: With dead ends: 824 [2022-01-18 15:25:40,773 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 15:25:40,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:25:40,774 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 195 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:40,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 236 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 15:25:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 495. [2022-01-18 15:25:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.0121457489878543) internal successors, (1488), 494 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1488 transitions. [2022-01-18 15:25:40,780 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1488 transitions. Word has length 22 [2022-01-18 15:25:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:40,780 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1488 transitions. [2022-01-18 15:25:40,780 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) [2022-01-18 15:25:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1488 transitions. [2022-01-18 15:25:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:40,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:40,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:40,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:40,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:40,986 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1538725671, now seen corresponding path program 166 times [2022-01-18 15:25:40,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:40,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708300392] [2022-01-18 15:25:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:40,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:41,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708300392] [2022-01-18 15:25:41,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708300392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755865443] [2022-01-18 15:25:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:41,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:41,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:41,050 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) [2022-01-18 15:25:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:25:41,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:41,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:41,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:41,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:41,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:41,467 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:41,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:41,468 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 [2022-01-18 15:25:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:41,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755865443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:41,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:41,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:41,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49506422] [2022-01-18 15:25:41,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:41,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:41,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:41,471 INFO L87 Difference]: Start difference. First operand 495 states and 1488 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) [2022-01-18 15:25:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:41,725 INFO L93 Difference]: Finished difference Result 821 states and 2389 transitions. [2022-01-18 15:25:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:25:41,725 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 [2022-01-18 15:25:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:41,726 INFO L225 Difference]: With dead ends: 821 [2022-01-18 15:25:41,726 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 15:25:41,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:25:41,726 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:41,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 190 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 15:25:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 492. [2022-01-18 15:25:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.0061099796334014) internal successors, (1476), 491 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1476 transitions. [2022-01-18 15:25:41,732 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1476 transitions. Word has length 22 [2022-01-18 15:25:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1476 transitions. [2022-01-18 15:25:41,732 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) [2022-01-18 15:25:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1476 transitions. [2022-01-18 15:25:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:41,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:41,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:41,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:41,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 15:25:41,951 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 232870889, now seen corresponding path program 167 times [2022-01-18 15:25:41,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:41,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728199635] [2022-01-18 15:25:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:41,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:42,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728199635] [2022-01-18 15:25:42,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728199635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541062660] [2022-01-18 15:25:42,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:42,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:42,023 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) [2022-01-18 15:25:42,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:25:42,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:42,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:42,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:42,368 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 47 treesize of output 45 [2022-01-18 15:25:42,458 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:42,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:42,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:42,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541062660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:42,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:42,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:42,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311804387] [2022-01-18 15:25:42,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:42,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:42,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:42,463 INFO L87 Difference]: Start difference. First operand 492 states and 1476 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) [2022-01-18 15:25:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:42,690 INFO L93 Difference]: Finished difference Result 749 states and 2181 transitions. [2022-01-18 15:25:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:42,690 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 [2022-01-18 15:25:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:42,691 INFO L225 Difference]: With dead ends: 749 [2022-01-18 15:25:42,691 INFO L226 Difference]: Without dead ends: 713 [2022-01-18 15:25:42,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:25:42,692 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:42,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 198 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-18 15:25:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2022-01-18 15:25:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0086021505376346) internal successors, (1399), 465 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1399 transitions. [2022-01-18 15:25:42,697 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1399 transitions. Word has length 22 [2022-01-18 15:25:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:42,697 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1399 transitions. [2022-01-18 15:25:42,697 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) [2022-01-18 15:25:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1399 transitions. [2022-01-18 15:25:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:42,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:42,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:42,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:42,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:42,925 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1000298955, now seen corresponding path program 168 times [2022-01-18 15:25:42,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:42,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365852003] [2022-01-18 15:25:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:42,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:42,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:42,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365852003] [2022-01-18 15:25:42,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365852003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:42,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102050231] [2022-01-18 15:25:42,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:42,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:42,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:42,977 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) [2022-01-18 15:25:42,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:25:43,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:43,253 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 31 treesize of output 23 [2022-01-18 15:25:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:43,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:43,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:43,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:43,435 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:43,435 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 8 treesize of output 7 [2022-01-18 15:25:43,436 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 [2022-01-18 15:25:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:43,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102050231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:43,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:43,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:43,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173713845] [2022-01-18 15:25:43,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:43,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:43,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:43,439 INFO L87 Difference]: Start difference. First operand 466 states and 1399 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) [2022-01-18 15:25:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:43,700 INFO L93 Difference]: Finished difference Result 695 states and 2046 transitions. [2022-01-18 15:25:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:25:43,700 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 [2022-01-18 15:25:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:43,701 INFO L225 Difference]: With dead ends: 695 [2022-01-18 15:25:43,701 INFO L226 Difference]: Without dead ends: 695 [2022-01-18 15:25:43,701 INFO L932 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 [2022-01-18 15:25:43,701 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:43,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 192 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-18 15:25:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 475. [2022-01-18 15:25:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.021097046413502) internal successors, (1432), 474 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1432 transitions. [2022-01-18 15:25:43,707 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1432 transitions. Word has length 22 [2022-01-18 15:25:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:43,707 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1432 transitions. [2022-01-18 15:25:43,707 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) [2022-01-18 15:25:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1432 transitions. [2022-01-18 15:25:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:43,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:43,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:43,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:43,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:43,924 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1800065377, now seen corresponding path program 169 times [2022-01-18 15:25:43,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930011994] [2022-01-18 15:25:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:43,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:43,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:43,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930011994] [2022-01-18 15:25:43,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930011994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:43,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340219629] [2022-01-18 15:25:43,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:43,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:43,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:43,988 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) [2022-01-18 15:25:43,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:25:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:44,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:44,336 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 31 treesize of output 23 [2022-01-18 15:25:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:44,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:44,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:44,581 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:44,582 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 [2022-01-18 15:25:44,583 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 [2022-01-18 15:25:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:44,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340219629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:44,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:44,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:44,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967020694] [2022-01-18 15:25:44,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:44,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:44,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:44,592 INFO L87 Difference]: Start difference. First operand 475 states and 1432 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) [2022-01-18 15:25:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:44,916 INFO L93 Difference]: Finished difference Result 724 states and 2127 transitions. [2022-01-18 15:25:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:44,917 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 [2022-01-18 15:25:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:44,918 INFO L225 Difference]: With dead ends: 724 [2022-01-18 15:25:44,918 INFO L226 Difference]: Without dead ends: 714 [2022-01-18 15:25:44,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:25:44,918 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 173 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:44,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 159 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-18 15:25:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 472. [2022-01-18 15:25:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.0148619957537157) internal successors, (1420), 471 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1420 transitions. [2022-01-18 15:25:44,923 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1420 transitions. Word has length 22 [2022-01-18 15:25:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1420 transitions. [2022-01-18 15:25:44,924 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) [2022-01-18 15:25:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1420 transitions. [2022-01-18 15:25:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:44,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:44,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:44,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:45,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:45,140 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1375118167, now seen corresponding path program 170 times [2022-01-18 15:25:45,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047229845] [2022-01-18 15:25:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:45,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047229845] [2022-01-18 15:25:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047229845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133837291] [2022-01-18 15:25:45,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:45,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:45,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:45,205 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) [2022-01-18 15:25:45,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:25:45,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:45,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:45,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:45,641 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:25:45,816 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:45,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:45,818 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 [2022-01-18 15:25:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133837291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:45,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:45,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:45,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122191366] [2022-01-18 15:25:45,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:45,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:45,823 INFO L87 Difference]: Start difference. First operand 472 states and 1420 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) [2022-01-18 15:25:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:46,150 INFO L93 Difference]: Finished difference Result 672 states and 1987 transitions. [2022-01-18 15:25:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:46,150 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 [2022-01-18 15:25:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:46,151 INFO L225 Difference]: With dead ends: 672 [2022-01-18 15:25:46,151 INFO L226 Difference]: Without dead ends: 652 [2022-01-18 15:25:46,151 INFO L932 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 [2022-01-18 15:25:46,152 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:46,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 188 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-18 15:25:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 469. [2022-01-18 15:25:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0085470085470085) internal successors, (1408), 468 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1408 transitions. [2022-01-18 15:25:46,157 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1408 transitions. Word has length 22 [2022-01-18 15:25:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:46,157 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1408 transitions. [2022-01-18 15:25:46,157 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) [2022-01-18 15:25:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1408 transitions. [2022-01-18 15:25:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:46,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:46,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:46,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:46,373 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,SelfDestructingSolverStorable186 [2022-01-18 15:25:46,373 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1214196745, now seen corresponding path program 171 times [2022-01-18 15:25:46,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:46,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35954993] [2022-01-18 15:25:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:46,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:46,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35954993] [2022-01-18 15:25:46,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35954993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945983588] [2022-01-18 15:25:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:46,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:46,458 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) [2022-01-18 15:25:46,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:25:46,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:46,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:46,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:46,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:46,992 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 18 treesize of output 22 [2022-01-18 15:25:47,092 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:47,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:47,095 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 [2022-01-18 15:25:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:47,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945983588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:47,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:47,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:47,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898371143] [2022-01-18 15:25:47,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:47,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:47,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:47,099 INFO L87 Difference]: Start difference. First operand 469 states and 1408 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) [2022-01-18 15:25:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:47,417 INFO L93 Difference]: Finished difference Result 787 states and 2296 transitions. [2022-01-18 15:25:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:25:47,417 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 [2022-01-18 15:25:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:47,418 INFO L225 Difference]: With dead ends: 787 [2022-01-18 15:25:47,418 INFO L226 Difference]: Without dead ends: 787 [2022-01-18 15:25:47,418 INFO L932 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 [2022-01-18 15:25:47,418 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 175 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:47,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 196 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-18 15:25:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 481. [2022-01-18 15:25:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.033333333333333) internal successors, (1456), 480 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1456 transitions. [2022-01-18 15:25:47,424 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1456 transitions. Word has length 22 [2022-01-18 15:25:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:47,424 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1456 transitions. [2022-01-18 15:25:47,424 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) [2022-01-18 15:25:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1456 transitions. [2022-01-18 15:25:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:47,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:47,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:47,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:47,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:47,625 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash 280406219, now seen corresponding path program 172 times [2022-01-18 15:25:47,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:47,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234461881] [2022-01-18 15:25:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:47,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:47,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:47,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234461881] [2022-01-18 15:25:47,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234461881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:47,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701628592] [2022-01-18 15:25:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:47,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:47,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:47,695 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) [2022-01-18 15:25:47,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:25:47,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:47,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:47,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:48,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:48,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:48,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:48,173 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:25:48,240 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:48,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:48,241 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 [2022-01-18 15:25:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701628592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:48,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:48,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201711885] [2022-01-18 15:25:48,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:48,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:48,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:48,246 INFO L87 Difference]: Start difference. First operand 481 states and 1456 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) [2022-01-18 15:25:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:48,450 INFO L93 Difference]: Finished difference Result 729 states and 2147 transitions. [2022-01-18 15:25:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:25:48,450 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 [2022-01-18 15:25:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:48,451 INFO L225 Difference]: With dead ends: 729 [2022-01-18 15:25:48,451 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 15:25:48,452 INFO L932 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 [2022-01-18 15:25:48,454 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 206 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 15:25:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 488. [2022-01-18 15:25:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0184804928131417) internal successors, (1470), 487 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) [2022-01-18 15:25:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1470 transitions. [2022-01-18 15:25:48,461 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1470 transitions. Word has length 22 [2022-01-18 15:25:48,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:48,461 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1470 transitions. [2022-01-18 15:25:48,461 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) [2022-01-18 15:25:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1470 transitions. [2022-01-18 15:25:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:48,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:48,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:48,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:48,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:48,671 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash -38706101, now seen corresponding path program 173 times [2022-01-18 15:25:48,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765126258] [2022-01-18 15:25:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:48,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:48,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765126258] [2022-01-18 15:25:48,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765126258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204944160] [2022-01-18 15:25:48,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:48,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:48,776 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) [2022-01-18 15:25:48,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:25:48,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:48,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:49,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:49,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:49,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:49,344 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:49,344 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 8 treesize of output 7 [2022-01-18 15:25:49,346 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 [2022-01-18 15:25:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:49,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204944160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:49,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:49,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:49,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986120376] [2022-01-18 15:25:49,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:49,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:49,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:49,349 INFO L87 Difference]: Start difference. First operand 488 states and 1470 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) [2022-01-18 15:25:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:49,513 INFO L93 Difference]: Finished difference Result 654 states and 1943 transitions. [2022-01-18 15:25:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:25:49,513 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 [2022-01-18 15:25:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:49,514 INFO L225 Difference]: With dead ends: 654 [2022-01-18 15:25:49,514 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 15:25:49,514 INFO L932 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 [2022-01-18 15:25:49,515 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:49,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 152 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 15:25:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 460. [2022-01-18 15:25:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.008714596949891) internal successors, (1381), 459 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1381 transitions. [2022-01-18 15:25:49,520 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1381 transitions. Word has length 22 [2022-01-18 15:25:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:49,520 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1381 transitions. [2022-01-18 15:25:49,520 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) [2022-01-18 15:25:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1381 transitions. [2022-01-18 15:25:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:49,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:49,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:49,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 15:25:49,722 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,SelfDestructingSolverStorable189 [2022-01-18 15:25:49,722 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1499669411, now seen corresponding path program 174 times [2022-01-18 15:25:49,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:49,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109024506] [2022-01-18 15:25:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:49,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:49,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109024506] [2022-01-18 15:25:49,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109024506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188554901] [2022-01-18 15:25:49,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:49,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:49,832 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) [2022-01-18 15:25:49,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:25:50,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:25:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:50,126 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 50 treesize of output 40 [2022-01-18 15:25:50,275 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 31 treesize of output 23 [2022-01-18 15:25:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:50,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:50,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:50,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:50,594 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:50,594 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 [2022-01-18 15:25:50,596 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 [2022-01-18 15:25:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:50,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188554901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:50,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:50,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:50,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306710565] [2022-01-18 15:25:50,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:50,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:50,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:50,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:50,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:50,601 INFO L87 Difference]: Start difference. First operand 460 states and 1381 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) [2022-01-18 15:25:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:50,911 INFO L93 Difference]: Finished difference Result 670 states and 1970 transitions. [2022-01-18 15:25:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:25:50,912 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 [2022-01-18 15:25:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:50,912 INFO L225 Difference]: With dead ends: 670 [2022-01-18 15:25:50,912 INFO L226 Difference]: Without dead ends: 670 [2022-01-18 15:25:50,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:25:50,913 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:50,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 176 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-18 15:25:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 470. [2022-01-18 15:25:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.029850746268657) internal successors, (1421), 469 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1421 transitions. [2022-01-18 15:25:50,918 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1421 transitions. Word has length 22 [2022-01-18 15:25:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:50,918 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1421 transitions. [2022-01-18 15:25:50,918 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) [2022-01-18 15:25:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1421 transitions. [2022-01-18 15:25:50,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:50,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:50,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:50,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:51,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 15:25:51,131 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash -5066447, now seen corresponding path program 175 times [2022-01-18 15:25:51,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:51,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857270435] [2022-01-18 15:25:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:51,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:51,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857270435] [2022-01-18 15:25:51,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857270435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856287120] [2022-01-18 15:25:51,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:51,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:51,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:51,190 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) [2022-01-18 15:25:51,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:25:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:51,445 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 50 treesize of output 40 [2022-01-18 15:25:51,549 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 39 treesize of output 31 [2022-01-18 15:25:51,550 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 35 treesize of output 27 [2022-01-18 15:25:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:51,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:51,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:51,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:51,744 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:51,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:51,745 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 [2022-01-18 15:25:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856287120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:51,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:51,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:51,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432038667] [2022-01-18 15:25:51,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:51,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:51,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:51,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:51,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:51,748 INFO L87 Difference]: Start difference. First operand 470 states and 1421 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) [2022-01-18 15:25:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:52,058 INFO L93 Difference]: Finished difference Result 699 states and 2051 transitions. [2022-01-18 15:25:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:52,058 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 [2022-01-18 15:25:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:52,059 INFO L225 Difference]: With dead ends: 699 [2022-01-18 15:25:52,059 INFO L226 Difference]: Without dead ends: 689 [2022-01-18 15:25:52,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:25:52,060 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:52,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 236 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-18 15:25:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 467. [2022-01-18 15:25:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.023605150214592) internal successors, (1409), 466 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1409 transitions. [2022-01-18 15:25:52,065 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1409 transitions. Word has length 22 [2022-01-18 15:25:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:52,065 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1409 transitions. [2022-01-18 15:25:52,065 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) [2022-01-18 15:25:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1409 transitions. [2022-01-18 15:25:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:52,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:52,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:52,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:52,277 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:52,277 INFO L85 PathProgramCache]: Analyzing trace with hash 419880763, now seen corresponding path program 176 times [2022-01-18 15:25:52,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:52,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98277726] [2022-01-18 15:25:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:52,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:52,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:52,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98277726] [2022-01-18 15:25:52,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98277726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:52,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644508761] [2022-01-18 15:25:52,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:52,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:52,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:52,346 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) [2022-01-18 15:25:52,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:25:52,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:52,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:52,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:52,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:52,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:52,758 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 47 treesize of output 45 [2022-01-18 15:25:52,849 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:52,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:52,851 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 [2022-01-18 15:25:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644508761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:52,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:52,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:52,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889941210] [2022-01-18 15:25:52,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:52,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:52,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:52,854 INFO L87 Difference]: Start difference. First operand 467 states and 1409 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) [2022-01-18 15:25:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:53,150 INFO L93 Difference]: Finished difference Result 657 states and 1937 transitions. [2022-01-18 15:25:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:25:53,150 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 [2022-01-18 15:25:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:53,151 INFO L225 Difference]: With dead ends: 657 [2022-01-18 15:25:53,151 INFO L226 Difference]: Without dead ends: 637 [2022-01-18 15:25:53,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:25:53,151 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:53,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 181 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-18 15:25:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 464. [2022-01-18 15:25:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.0172786177105833) internal successors, (1397), 463 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1397 transitions. [2022-01-18 15:25:53,157 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1397 transitions. Word has length 22 [2022-01-18 15:25:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:53,157 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1397 transitions. [2022-01-18 15:25:53,157 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) [2022-01-18 15:25:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1397 transitions. [2022-01-18 15:25:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:53,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:53,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:53,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:53,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:53,365 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash -203057903, now seen corresponding path program 177 times [2022-01-18 15:25:53,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:53,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622881591] [2022-01-18 15:25:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:53,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:53,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:53,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622881591] [2022-01-18 15:25:53,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622881591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:53,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288721454] [2022-01-18 15:25:53,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:53,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:53,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:53,465 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) [2022-01-18 15:25:53,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:25:53,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:53,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:53,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:53,763 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 [2022-01-18 15:25:53,857 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 45 treesize of output 37 [2022-01-18 15:25:53,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:53,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:54,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:54,021 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:25:54,154 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:54,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:54,156 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 [2022-01-18 15:25:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:54,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288721454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:54,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:54,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:54,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294782765] [2022-01-18 15:25:54,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:54,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:54,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:54,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:54,172 INFO L87 Difference]: Start difference. First operand 464 states and 1397 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) [2022-01-18 15:25:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:54,435 INFO L93 Difference]: Finished difference Result 788 states and 2306 transitions. [2022-01-18 15:25:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:25:54,435 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 [2022-01-18 15:25:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:54,436 INFO L225 Difference]: With dead ends: 788 [2022-01-18 15:25:54,436 INFO L226 Difference]: Without dead ends: 788 [2022-01-18 15:25:54,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:25:54,436 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 233 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:54,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 177 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-18 15:25:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 474. [2022-01-18 15:25:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.0528541226215644) internal successors, (1444), 473 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1444 transitions. [2022-01-18 15:25:54,442 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1444 transitions. Word has length 22 [2022-01-18 15:25:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:54,442 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1444 transitions. [2022-01-18 15:25:54,442 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) [2022-01-18 15:25:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1444 transitions. [2022-01-18 15:25:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:54,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:54,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:54,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:54,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:54,658 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1291545061, now seen corresponding path program 178 times [2022-01-18 15:25:54,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:54,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971812134] [2022-01-18 15:25:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:54,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:54,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971812134] [2022-01-18 15:25:54,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971812134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512696536] [2022-01-18 15:25:54,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:54,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:54,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:54,712 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) [2022-01-18 15:25:54,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:25:54,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:54,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:54,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:54,986 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 50 treesize of output 40 [2022-01-18 15:25:55,063 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 45 treesize of output 35 [2022-01-18 15:25:55,065 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 39 treesize of output 33 [2022-01-18 15:25:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:55,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:55,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:55,178 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 47 treesize of output 45 [2022-01-18 15:25:55,264 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:55,264 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 8 treesize of output 7 [2022-01-18 15:25:55,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:55,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512696536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:55,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:55,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:55,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693418822] [2022-01-18 15:25:55,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:55,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:55,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:55,269 INFO L87 Difference]: Start difference. First operand 474 states and 1444 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) [2022-01-18 15:25:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:55,593 INFO L93 Difference]: Finished difference Result 841 states and 2445 transitions. [2022-01-18 15:25:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:25:55,593 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 [2022-01-18 15:25:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:55,594 INFO L225 Difference]: With dead ends: 841 [2022-01-18 15:25:55,594 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 15:25:55,595 INFO L932 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 [2022-01-18 15:25:55,595 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:55,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 185 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 15:25:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 481. [2022-01-18 15:25:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0375) internal successors, (1458), 480 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1458 transitions. [2022-01-18 15:25:55,601 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1458 transitions. Word has length 22 [2022-01-18 15:25:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:55,601 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1458 transitions. [2022-01-18 15:25:55,601 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) [2022-01-18 15:25:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1458 transitions. [2022-01-18 15:25:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:55,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:55,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:55,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:55,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 15:25:55,803 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1962347043, now seen corresponding path program 179 times [2022-01-18 15:25:55,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:55,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402962869] [2022-01-18 15:25:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:55,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:55,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402962869] [2022-01-18 15:25:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402962869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202508418] [2022-01-18 15:25:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:55,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:55,858 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) [2022-01-18 15:25:55,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:25:56,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:56,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:56,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:56,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:56,121 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 50 treesize of output 40 [2022-01-18 15:25:56,242 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 44 treesize of output 36 [2022-01-18 15:25:56,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:25:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:56,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:56,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:56,441 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 47 treesize of output 45 [2022-01-18 15:25:56,542 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:56,542 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 8 treesize of output 7 [2022-01-18 15:25:56,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:56,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202508418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:56,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:56,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:25:56,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556166638] [2022-01-18 15:25:56,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:56,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:25:56,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:25:56,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:56,547 INFO L87 Difference]: Start difference. First operand 481 states and 1458 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) [2022-01-18 15:25:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:56,793 INFO L93 Difference]: Finished difference Result 871 states and 2487 transitions. [2022-01-18 15:25:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:25:56,793 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 [2022-01-18 15:25:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:56,794 INFO L225 Difference]: With dead ends: 871 [2022-01-18 15:25:56,794 INFO L226 Difference]: Without dead ends: 871 [2022-01-18 15:25:56,794 INFO L932 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 [2022-01-18 15:25:56,794 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:56,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 173 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-18 15:25:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 462. [2022-01-18 15:25:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0108459869848154) internal successors, (1388), 461 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1388 transitions. [2022-01-18 15:25:56,800 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1388 transitions. Word has length 22 [2022-01-18 15:25:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:56,801 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1388 transitions. [2022-01-18 15:25:56,801 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) [2022-01-18 15:25:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1388 transitions. [2022-01-18 15:25:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:56,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:56,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:56,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:57,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:57,018 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash 255790949, now seen corresponding path program 180 times [2022-01-18 15:25:57,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:57,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827002538] [2022-01-18 15:25:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:57,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:57,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827002538] [2022-01-18 15:25:57,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827002538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615363146] [2022-01-18 15:25:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:57,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:57,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:57,072 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) [2022-01-18 15:25:57,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:25:57,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:25:57,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:57,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:25:57,410 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 44 treesize of output 36 [2022-01-18 15:25:57,411 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 40 treesize of output 32 [2022-01-18 15:25:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:57,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:57,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:57,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:57,685 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:57,685 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 8 treesize of output 7 [2022-01-18 15:25:57,686 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 [2022-01-18 15:25:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:57,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615363146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:57,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:57,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:25:57,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105956050] [2022-01-18 15:25:57,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:57,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:57,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:57,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:57,689 INFO L87 Difference]: Start difference. First operand 462 states and 1388 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) [2022-01-18 15:25:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:57,878 INFO L93 Difference]: Finished difference Result 720 states and 2085 transitions. [2022-01-18 15:25:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:25:57,878 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 [2022-01-18 15:25:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:57,879 INFO L225 Difference]: With dead ends: 720 [2022-01-18 15:25:57,879 INFO L226 Difference]: Without dead ends: 711 [2022-01-18 15:25:57,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:25:57,879 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:57,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 168 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-01-18 15:25:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 478. [2022-01-18 15:25:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.029350104821803) internal successors, (1445), 477 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1445 transitions. [2022-01-18 15:25:57,884 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1445 transitions. Word has length 22 [2022-01-18 15:25:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:57,884 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1445 transitions. [2022-01-18 15:25:57,884 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) [2022-01-18 15:25:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1445 transitions. [2022-01-18 15:25:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:57,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:57,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:57,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:58,095 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,SelfDestructingSolverStorable196 [2022-01-18 15:25:58,095 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash 598040443, now seen corresponding path program 181 times [2022-01-18 15:25:58,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916785195] [2022-01-18 15:25:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:58,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:58,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916785195] [2022-01-18 15:25:58,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916785195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122501743] [2022-01-18 15:25:58,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:58,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:58,189 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) [2022-01-18 15:25:58,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:25:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:58,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:58,443 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 50 treesize of output 40 [2022-01-18 15:25:58,561 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 47 treesize of output 39 [2022-01-18 15:25:58,564 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 43 treesize of output 35 [2022-01-18 15:25:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:58,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:58,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:58,717 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 47 treesize of output 45 [2022-01-18 15:25:58,856 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:58,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:25:58,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:25:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:58,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122501743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:58,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:58,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:25:58,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476776816] [2022-01-18 15:25:58,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:58,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:58,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:58,862 INFO L87 Difference]: Start difference. First operand 478 states and 1445 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) [2022-01-18 15:25:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:59,451 INFO L93 Difference]: Finished difference Result 832 states and 2364 transitions. [2022-01-18 15:25:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:25:59,451 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 [2022-01-18 15:25:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:59,452 INFO L225 Difference]: With dead ends: 832 [2022-01-18 15:25:59,452 INFO L226 Difference]: Without dead ends: 822 [2022-01-18 15:25:59,453 INFO L932 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 [2022-01-18 15:25:59,453 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:59,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 303 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:25:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-18 15:25:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 500. [2022-01-18 15:25:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.024048096192385) internal successors, (1509), 499 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1509 transitions. [2022-01-18 15:25:59,459 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1509 transitions. Word has length 22 [2022-01-18 15:25:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:59,459 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1509 transitions. [2022-01-18 15:25:59,459 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) [2022-01-18 15:25:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1509 transitions. [2022-01-18 15:25:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:25:59,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:59,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:59,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:59,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:59,674 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash -982731473, now seen corresponding path program 182 times [2022-01-18 15:25:59,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:59,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325240317] [2022-01-18 15:25:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:59,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:59,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325240317] [2022-01-18 15:25:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325240317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216514615] [2022-01-18 15:25:59,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:59,775 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) [2022-01-18 15:25:59,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:25:59,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:59,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:59,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:25:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:00,067 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 50 treesize of output 40 [2022-01-18 15:26:00,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:00,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:00,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:00,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:00,389 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:00,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:00,391 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 [2022-01-18 15:26:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:00,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216514615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:00,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:00,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:26:00,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333622653] [2022-01-18 15:26:00,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:00,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:26:00,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:00,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:26:00,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:26:00,394 INFO L87 Difference]: Start difference. First operand 500 states and 1509 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) [2022-01-18 15:26:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:00,664 INFO L93 Difference]: Finished difference Result 789 states and 2253 transitions. [2022-01-18 15:26:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:26:00,664 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 [2022-01-18 15:26:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:00,665 INFO L225 Difference]: With dead ends: 789 [2022-01-18 15:26:00,665 INFO L226 Difference]: Without dead ends: 777 [2022-01-18 15:26:00,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:26:00,666 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 148 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:00,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 222 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-18 15:26:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 480. [2022-01-18 15:26:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0250521920668056) internal successors, (1449), 479 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1449 transitions. [2022-01-18 15:26:00,671 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1449 transitions. Word has length 22 [2022-01-18 15:26:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:00,671 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1449 transitions. [2022-01-18 15:26:00,671 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) [2022-01-18 15:26:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1449 transitions. [2022-01-18 15:26:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:00,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:00,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:00,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 15:26:00,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:00,888 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 396074085, now seen corresponding path program 183 times [2022-01-18 15:26:00,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853013623] [2022-01-18 15:26:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:00,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:00,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853013623] [2022-01-18 15:26:00,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853013623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142464847] [2022-01-18 15:26:00,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:00,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:00,942 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) [2022-01-18 15:26:00,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:26:01,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:26:01,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:01,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:01,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:01,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:01,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:01,528 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 [2022-01-18 15:26:01,689 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:01,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:01,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:01,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142464847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:01,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:01,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:01,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479808455] [2022-01-18 15:26:01,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:01,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:01,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:01,698 INFO L87 Difference]: Start difference. First operand 480 states and 1449 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) [2022-01-18 15:26:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:02,099 INFO L93 Difference]: Finished difference Result 639 states and 1885 transitions. [2022-01-18 15:26:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:26:02,099 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 [2022-01-18 15:26:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:02,100 INFO L225 Difference]: With dead ends: 639 [2022-01-18 15:26:02,100 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 15:26:02,100 INFO L932 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 [2022-01-18 15:26:02,100 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:02,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 171 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:26:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 15:26:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 486. [2022-01-18 15:26:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0144329896907216) internal successors, (1462), 485 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1462 transitions. [2022-01-18 15:26:02,106 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1462 transitions. Word has length 22 [2022-01-18 15:26:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:02,106 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1462 transitions. [2022-01-18 15:26:02,106 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) [2022-01-18 15:26:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1462 transitions. [2022-01-18 15:26:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:02,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:02,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:02,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:02,319 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,SelfDestructingSolverStorable199 [2022-01-18 15:26:02,319 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:02,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:02,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1363215055, now seen corresponding path program 184 times [2022-01-18 15:26:02,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:02,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031449018] [2022-01-18 15:26:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:02,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:02,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031449018] [2022-01-18 15:26:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031449018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975579876] [2022-01-18 15:26:02,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:02,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:02,398 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) [2022-01-18 15:26:02,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:26:02,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:02,693 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 [2022-01-18 15:26:02,860 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 28 treesize of output 22 [2022-01-18 15:26:02,862 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 26 treesize of output 20 [2022-01-18 15:26:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:02,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:02,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:02,981 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 47 treesize of output 45 [2022-01-18 15:26:03,156 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:03,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:03,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975579876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:03,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:03,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:26:03,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054253818] [2022-01-18 15:26:03,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:03,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:26:03,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:26:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:26:03,163 INFO L87 Difference]: Start difference. First operand 486 states and 1462 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) [2022-01-18 15:26:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:03,544 INFO L93 Difference]: Finished difference Result 717 states and 2063 transitions. [2022-01-18 15:26:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:26:03,544 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 [2022-01-18 15:26:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:03,545 INFO L225 Difference]: With dead ends: 717 [2022-01-18 15:26:03,545 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 15:26:03,545 INFO L932 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 [2022-01-18 15:26:03,546 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 188 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:03,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 174 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 15:26:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 508. [2022-01-18 15:26:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.009861932938856) internal successors, (1526), 507 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1526 transitions. [2022-01-18 15:26:03,551 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1526 transitions. Word has length 22 [2022-01-18 15:26:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:03,551 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1526 transitions. [2022-01-18 15:26:03,551 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) [2022-01-18 15:26:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1526 transitions. [2022-01-18 15:26:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:03,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:03,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:03,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:03,768 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,SelfDestructingSolverStorable200 [2022-01-18 15:26:03,768 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1350980325, now seen corresponding path program 185 times [2022-01-18 15:26:03,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:03,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49585752] [2022-01-18 15:26:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:03,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:03,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49585752] [2022-01-18 15:26:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49585752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109605753] [2022-01-18 15:26:03,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:03,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:03,847 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) [2022-01-18 15:26:03,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:26:04,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:26:04,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:04,134 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 50 treesize of output 40 [2022-01-18 15:26:04,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:04,266 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 26 treesize of output 20 [2022-01-18 15:26:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:04,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:04,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:04,398 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 15:26:04,530 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:04,530 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:26:04,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:04,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109605753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:04,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:04,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:26:04,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991833602] [2022-01-18 15:26:04,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:04,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:26:04,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:26:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:26:04,537 INFO L87 Difference]: Start difference. First operand 508 states and 1526 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) [2022-01-18 15:26:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:04,892 INFO L93 Difference]: Finished difference Result 674 states and 1952 transitions. [2022-01-18 15:26:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:26:04,892 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 [2022-01-18 15:26:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:04,893 INFO L225 Difference]: With dead ends: 674 [2022-01-18 15:26:04,893 INFO L226 Difference]: Without dead ends: 659 [2022-01-18 15:26:04,893 INFO L932 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 [2022-01-18 15:26:04,894 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:04,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 175 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-18 15:26:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 482. [2022-01-18 15:26:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0207900207900207) internal successors, (1453), 481 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1453 transitions. [2022-01-18 15:26:04,899 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1453 transitions. Word has length 22 [2022-01-18 15:26:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:04,899 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1453 transitions. [2022-01-18 15:26:04,899 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) [2022-01-18 15:26:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1453 transitions. [2022-01-18 15:26:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:04,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:04,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:04,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:05,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:05,100 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -24051833, now seen corresponding path program 186 times [2022-01-18 15:26:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:05,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150486769] [2022-01-18 15:26:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:05,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:05,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150486769] [2022-01-18 15:26:05,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150486769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464144849] [2022-01-18 15:26:05,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:05,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:05,193 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) [2022-01-18 15:26:05,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:26:05,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:05,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:05,584 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 31 treesize of output 23 [2022-01-18 15:26:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:05,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:05,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:05,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:05,859 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:05,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:05,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:05,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464144849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:05,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:05,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:26:05,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237142979] [2022-01-18 15:26:05,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:05,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:26:05,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:05,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:26:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:05,864 INFO L87 Difference]: Start difference. First operand 482 states and 1453 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) [2022-01-18 15:26:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:06,084 INFO L93 Difference]: Finished difference Result 653 states and 1905 transitions. [2022-01-18 15:26:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:06,084 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 [2022-01-18 15:26:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:06,085 INFO L225 Difference]: With dead ends: 653 [2022-01-18 15:26:06,085 INFO L226 Difference]: Without dead ends: 653 [2022-01-18 15:26:06,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:06,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:06,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 198 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-18 15:26:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 485. [2022-01-18 15:26:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.010330578512397) internal successors, (1457), 484 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1457 transitions. [2022-01-18 15:26:06,102 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1457 transitions. Word has length 22 [2022-01-18 15:26:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:06,102 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1457 transitions. [2022-01-18 15:26:06,103 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) [2022-01-18 15:26:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1457 transitions. [2022-01-18 15:26:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:06,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:06,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:06,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:06,305 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,SelfDestructingSolverStorable202 [2022-01-18 15:26:06,305 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1470551131, now seen corresponding path program 187 times [2022-01-18 15:26:06,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:06,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799761247] [2022-01-18 15:26:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:06,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:06,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799761247] [2022-01-18 15:26:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799761247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130955580] [2022-01-18 15:26:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:06,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:06,388 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) [2022-01-18 15:26:06,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:26:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:06,693 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 31 treesize of output 23 [2022-01-18 15:26:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:06,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:06,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:06,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:06,864 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:06,864 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 8 treesize of output 7 [2022-01-18 15:26:06,866 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 [2022-01-18 15:26:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:06,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130955580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:06,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:06,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:06,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292464366] [2022-01-18 15:26:06,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:06,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:06,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:06,869 INFO L87 Difference]: Start difference. First operand 485 states and 1457 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) [2022-01-18 15:26:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:07,126 INFO L93 Difference]: Finished difference Result 682 states and 1983 transitions. [2022-01-18 15:26:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:26:07,127 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 [2022-01-18 15:26:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:07,128 INFO L225 Difference]: With dead ends: 682 [2022-01-18 15:26:07,128 INFO L226 Difference]: Without dead ends: 672 [2022-01-18 15:26:07,128 INFO L932 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 [2022-01-18 15:26:07,128 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:07,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 203 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-18 15:26:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 482. [2022-01-18 15:26:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.004158004158004) internal successors, (1445), 481 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1445 transitions. [2022-01-18 15:26:07,133 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1445 transitions. Word has length 22 [2022-01-18 15:26:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:07,133 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1445 transitions. [2022-01-18 15:26:07,133 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) [2022-01-18 15:26:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1445 transitions. [2022-01-18 15:26:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:07,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:07,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:07,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:07,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:07,350 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1895498341, now seen corresponding path program 188 times [2022-01-18 15:26:07,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:07,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277667949] [2022-01-18 15:26:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:07,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:07,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277667949] [2022-01-18 15:26:07,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277667949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:07,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563534885] [2022-01-18 15:26:07,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:07,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:07,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:07,422 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) [2022-01-18 15:26:07,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:26:07,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:07,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:07,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:07,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:07,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:07,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:08,013 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:08,014 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 8 treesize of output 7 [2022-01-18 15:26:08,015 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 [2022-01-18 15:26:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:08,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563534885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:08,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:08,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:08,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433105110] [2022-01-18 15:26:08,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:08,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:08,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:08,018 INFO L87 Difference]: Start difference. First operand 482 states and 1445 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) [2022-01-18 15:26:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:08,275 INFO L93 Difference]: Finished difference Result 630 states and 1855 transitions. [2022-01-18 15:26:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:26:08,275 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 [2022-01-18 15:26:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:08,276 INFO L225 Difference]: With dead ends: 630 [2022-01-18 15:26:08,276 INFO L226 Difference]: Without dead ends: 610 [2022-01-18 15:26:08,276 INFO L932 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 [2022-01-18 15:26:08,276 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:08,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 214 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-18 15:26:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2022-01-18 15:26:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.0086393088552916) internal successors, (1393), 463 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1393 transitions. [2022-01-18 15:26:08,291 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1393 transitions. Word has length 22 [2022-01-18 15:26:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:08,291 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1393 transitions. [2022-01-18 15:26:08,291 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) [2022-01-18 15:26:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1393 transitions. [2022-01-18 15:26:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:08,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:08,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:08,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:08,492 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,SelfDestructingSolverStorable204 [2022-01-18 15:26:08,492 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash -59659887, now seen corresponding path program 189 times [2022-01-18 15:26:08,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:08,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427823743] [2022-01-18 15:26:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:08,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:08,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427823743] [2022-01-18 15:26:08,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427823743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538355227] [2022-01-18 15:26:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:08,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:08,588 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) [2022-01-18 15:26:08,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:26:08,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:26:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:08,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:08,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:08,950 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 20 treesize of output 14 [2022-01-18 15:26:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:08,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:09,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:09,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:09,276 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:09,276 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 8 treesize of output 7 [2022-01-18 15:26:09,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:09,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538355227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:09,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:26:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135051370] [2022-01-18 15:26:09,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:09,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:26:09,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:26:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:09,283 INFO L87 Difference]: Start difference. First operand 464 states and 1393 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) [2022-01-18 15:26:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:09,590 INFO L93 Difference]: Finished difference Result 712 states and 2089 transitions. [2022-01-18 15:26:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:26:09,590 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 [2022-01-18 15:26:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:09,591 INFO L225 Difference]: With dead ends: 712 [2022-01-18 15:26:09,591 INFO L226 Difference]: Without dead ends: 712 [2022-01-18 15:26:09,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:26:09,591 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:09,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 186 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-18 15:26:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 476. [2022-01-18 15:26:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.033684210526316) internal successors, (1441), 475 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1441 transitions. [2022-01-18 15:26:09,597 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1441 transitions. Word has length 22 [2022-01-18 15:26:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:09,597 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1441 transitions. [2022-01-18 15:26:09,597 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) [2022-01-18 15:26:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1441 transitions. [2022-01-18 15:26:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:09,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:09,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:09,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 15:26:09,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:09,807 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1434943077, now seen corresponding path program 190 times [2022-01-18 15:26:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829181058] [2022-01-18 15:26:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:09,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:09,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829181058] [2022-01-18 15:26:09,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829181058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567428310] [2022-01-18 15:26:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:09,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:09,902 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) [2022-01-18 15:26:09,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:26:10,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:10,296 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 20 treesize of output 14 [2022-01-18 15:26:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:10,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:10,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:10,485 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 18 treesize of output 22 [2022-01-18 15:26:10,595 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:10,595 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 [2022-01-18 15:26:10,597 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 [2022-01-18 15:26:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:10,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567428310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:10,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:10,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:10,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709895180] [2022-01-18 15:26:10,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:10,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:10,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:10,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:10,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:10,602 INFO L87 Difference]: Start difference. First operand 476 states and 1441 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) [2022-01-18 15:26:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:10,861 INFO L93 Difference]: Finished difference Result 687 states and 2021 transitions. [2022-01-18 15:26:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:10,861 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 [2022-01-18 15:26:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:10,862 INFO L225 Difference]: With dead ends: 687 [2022-01-18 15:26:10,862 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 15:26:10,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:26:10,871 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:10,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 198 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 15:26:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 483. [2022-01-18 15:26:10,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0186721991701244) internal successors, (1455), 482 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1455 transitions. [2022-01-18 15:26:10,877 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1455 transitions. Word has length 22 [2022-01-18 15:26:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:10,877 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1455 transitions. [2022-01-18 15:26:10,877 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) [2022-01-18 15:26:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1455 transitions. [2022-01-18 15:26:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:10,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:10,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:10,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 15:26:11,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:11,079 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1115830757, now seen corresponding path program 191 times [2022-01-18 15:26:11,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320666308] [2022-01-18 15:26:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:11,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:11,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320666308] [2022-01-18 15:26:11,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320666308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616704609] [2022-01-18 15:26:11,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:11,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:11,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:11,177 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) [2022-01-18 15:26:11,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:26:11,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:11,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:11,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:11,661 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:26:11,759 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:11,759 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 8 treesize of output 7 [2022-01-18 15:26:11,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:11,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616704609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:11,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:11,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:11,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825859357] [2022-01-18 15:26:11,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:11,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:11,766 INFO L87 Difference]: Start difference. First operand 483 states and 1455 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) [2022-01-18 15:26:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:11,996 INFO L93 Difference]: Finished difference Result 612 states and 1817 transitions. [2022-01-18 15:26:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:11,996 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 [2022-01-18 15:26:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:11,997 INFO L225 Difference]: With dead ends: 612 [2022-01-18 15:26:11,997 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 15:26:11,997 INFO L932 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 [2022-01-18 15:26:11,998 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:11,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 113 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 15:26:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 461. [2022-01-18 15:26:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.008695652173913) internal successors, (1384), 460 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1384 transitions. [2022-01-18 15:26:12,003 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1384 transitions. Word has length 22 [2022-01-18 15:26:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:12,003 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1384 transitions. [2022-01-18 15:26:12,003 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) [2022-01-18 15:26:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1384 transitions. [2022-01-18 15:26:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:12,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:12,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:12,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:12,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:12,214 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1546790043, now seen corresponding path program 192 times [2022-01-18 15:26:12,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:12,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420078125] [2022-01-18 15:26:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:12,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:12,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420078125] [2022-01-18 15:26:12,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420078125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485698058] [2022-01-18 15:26:12,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:12,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:12,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:12,280 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) [2022-01-18 15:26:12,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:26:12,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:12,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:12,560 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 29 treesize of output 23 [2022-01-18 15:26:12,670 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 59 treesize of output 47 [2022-01-18 15:26:12,672 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 51 treesize of output 41 [2022-01-18 15:26:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:13,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:13,021 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:26:13,100 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:13,101 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 8 treesize of output 7 [2022-01-18 15:26:13,103 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 [2022-01-18 15:26:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485698058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:13,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:26:13,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715976195] [2022-01-18 15:26:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:26:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:26:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:13,107 INFO L87 Difference]: Start difference. First operand 461 states and 1384 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) [2022-01-18 15:26:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:13,537 INFO L93 Difference]: Finished difference Result 868 states and 2508 transitions. [2022-01-18 15:26:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:26:13,537 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 [2022-01-18 15:26:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:13,539 INFO L225 Difference]: With dead ends: 868 [2022-01-18 15:26:13,539 INFO L226 Difference]: Without dead ends: 868 [2022-01-18 15:26:13,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:26:13,539 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:13,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 220 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-18 15:26:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 475. [2022-01-18 15:26:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.0527426160337554) internal successors, (1447), 474 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1447 transitions. [2022-01-18 15:26:13,545 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1447 transitions. Word has length 22 [2022-01-18 15:26:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:13,545 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1447 transitions. [2022-01-18 15:26:13,545 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) [2022-01-18 15:26:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1447 transitions. [2022-01-18 15:26:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:13,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:13,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:13,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:13,754 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,SelfDestructingSolverStorable208 [2022-01-18 15:26:13,754 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash -52187079, now seen corresponding path program 193 times [2022-01-18 15:26:13,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802211445] [2022-01-18 15:26:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:13,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:13,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:13,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802211445] [2022-01-18 15:26:13,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802211445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:13,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115842263] [2022-01-18 15:26:13,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:13,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:13,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:13,815 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) [2022-01-18 15:26:13,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:26:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:14,142 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 29 treesize of output 23 [2022-01-18 15:26:14,249 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 60 treesize of output 48 [2022-01-18 15:26:14,251 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 52 treesize of output 42 [2022-01-18 15:26:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:14,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:14,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:14,511 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 18 treesize of output 22 [2022-01-18 15:26:14,590 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:14,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:14,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:14,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115842263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:14,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:14,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:14,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657625382] [2022-01-18 15:26:14,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:14,597 INFO L87 Difference]: Start difference. First operand 475 states and 1447 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) [2022-01-18 15:26:15,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:15,064 INFO L93 Difference]: Finished difference Result 919 states and 2628 transitions. [2022-01-18 15:26:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:26:15,064 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 [2022-01-18 15:26:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:15,065 INFO L225 Difference]: With dead ends: 919 [2022-01-18 15:26:15,065 INFO L226 Difference]: Without dead ends: 909 [2022-01-18 15:26:15,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:26:15,065 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 263 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:15,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 239 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:26:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-18 15:26:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 482. [2022-01-18 15:26:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0374220374220373) internal successors, (1461), 481 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1461 transitions. [2022-01-18 15:26:15,072 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1461 transitions. Word has length 22 [2022-01-18 15:26:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:15,072 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1461 transitions. [2022-01-18 15:26:15,072 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) [2022-01-18 15:26:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1461 transitions. [2022-01-18 15:26:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:15,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:15,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:15,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:15,282 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,SelfDestructingSolverStorable209 [2022-01-18 15:26:15,282 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 988888113, now seen corresponding path program 194 times [2022-01-18 15:26:15,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766338521] [2022-01-18 15:26:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:15,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:15,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:15,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766338521] [2022-01-18 15:26:15,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766338521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:15,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944901666] [2022-01-18 15:26:15,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:15,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:15,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:15,355 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) [2022-01-18 15:26:15,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:26:15,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:15,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:15,644 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 29 treesize of output 23 [2022-01-18 15:26:15,704 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 60 treesize of output 48 [2022-01-18 15:26:15,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:15,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:15,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:15,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:15,991 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:15,992 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 8 treesize of output 7 [2022-01-18 15:26:15,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:15,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944901666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:15,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:15,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:26:15,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121873294] [2022-01-18 15:26:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:15,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:26:15,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:26:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:15,998 INFO L87 Difference]: Start difference. First operand 482 states and 1461 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) [2022-01-18 15:26:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:16,418 INFO L93 Difference]: Finished difference Result 877 states and 2538 transitions. [2022-01-18 15:26:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:26:16,418 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 [2022-01-18 15:26:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:16,419 INFO L225 Difference]: With dead ends: 877 [2022-01-18 15:26:16,419 INFO L226 Difference]: Without dead ends: 877 [2022-01-18 15:26:16,419 INFO L932 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 [2022-01-18 15:26:16,419 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 238 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:16,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 160 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-18 15:26:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 480. [2022-01-18 15:26:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0313152400835075) internal successors, (1452), 479 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1452 transitions. [2022-01-18 15:26:16,425 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1452 transitions. Word has length 22 [2022-01-18 15:26:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1452 transitions. [2022-01-18 15:26:16,426 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) [2022-01-18 15:26:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1452 transitions. [2022-01-18 15:26:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:16,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:16,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:16,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:16,639 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,SelfDestructingSolverStorable210 [2022-01-18 15:26:16,639 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1087941191, now seen corresponding path program 195 times [2022-01-18 15:26:16,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:16,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291421648] [2022-01-18 15:26:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:16,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:16,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291421648] [2022-01-18 15:26:16,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291421648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151314779] [2022-01-18 15:26:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:16,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:16,734 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) [2022-01-18 15:26:16,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:26:16,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:26:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:17,039 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 29 treesize of output 23 [2022-01-18 15:26:17,147 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 59 treesize of output 47 [2022-01-18 15:26:17,149 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 51 treesize of output 41 [2022-01-18 15:26:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:17,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:17,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:17,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:17,504 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:17,504 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 8 treesize of output 7 [2022-01-18 15:26:17,507 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 [2022-01-18 15:26:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:17,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151314779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:17,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:17,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:17,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31680442] [2022-01-18 15:26:17,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:17,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:17,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:17,512 INFO L87 Difference]: Start difference. First operand 480 states and 1452 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) [2022-01-18 15:26:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:17,858 INFO L93 Difference]: Finished difference Result 834 states and 2403 transitions. [2022-01-18 15:26:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:26:17,858 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 [2022-01-18 15:26:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:17,860 INFO L225 Difference]: With dead ends: 834 [2022-01-18 15:26:17,860 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 15:26:17,860 INFO L932 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 [2022-01-18 15:26:17,860 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 211 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 194 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 15:26:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 494. [2022-01-18 15:26:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.0425963488843815) internal successors, (1500), 493 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1500 transitions. [2022-01-18 15:26:17,866 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1500 transitions. Word has length 22 [2022-01-18 15:26:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:17,866 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1500 transitions. [2022-01-18 15:26:17,866 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) [2022-01-18 15:26:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1500 transitions. [2022-01-18 15:26:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:17,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:17,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:17,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:18,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:18,083 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -745691697, now seen corresponding path program 196 times [2022-01-18 15:26:18,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:18,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150807369] [2022-01-18 15:26:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:18,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:18,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150807369] [2022-01-18 15:26:18,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150807369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408086871] [2022-01-18 15:26:18,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:18,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:18,173 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) [2022-01-18 15:26:18,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:26:18,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:18,476 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 29 treesize of output 23 [2022-01-18 15:26:18,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:18,567 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 51 treesize of output 41 [2022-01-18 15:26:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:18,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:18,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:18,789 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 18 treesize of output 22 [2022-01-18 15:26:18,868 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:18,868 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 8 treesize of output 7 [2022-01-18 15:26:18,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:18,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408086871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:18,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:18,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:26:18,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518237623] [2022-01-18 15:26:18,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:18,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:26:18,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:26:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:26:18,876 INFO L87 Difference]: Start difference. First operand 494 states and 1500 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) [2022-01-18 15:26:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:19,263 INFO L93 Difference]: Finished difference Result 860 states and 2458 transitions. [2022-01-18 15:26:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:26:19,263 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 [2022-01-18 15:26:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:19,264 INFO L225 Difference]: With dead ends: 860 [2022-01-18 15:26:19,264 INFO L226 Difference]: Without dead ends: 850 [2022-01-18 15:26:19,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:19,264 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 155 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:19,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 212 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-18 15:26:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 506. [2022-01-18 15:26:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.0455445544554456) internal successors, (1538), 505 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1538 transitions. [2022-01-18 15:26:19,271 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1538 transitions. Word has length 22 [2022-01-18 15:26:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:19,271 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1538 transitions. [2022-01-18 15:26:19,271 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) [2022-01-18 15:26:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1538 transitions. [2022-01-18 15:26:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:19,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:19,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:19,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:19,486 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,SelfDestructingSolverStorable212 [2022-01-18 15:26:19,487 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1968503683, now seen corresponding path program 197 times [2022-01-18 15:26:19,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:19,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392876872] [2022-01-18 15:26:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:19,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:19,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:19,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392876872] [2022-01-18 15:26:19,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392876872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:19,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307569251] [2022-01-18 15:26:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:19,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:19,544 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) [2022-01-18 15:26:19,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:26:19,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:26:19,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:19,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:19,872 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 59 treesize of output 47 [2022-01-18 15:26:19,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:19,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:20,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:20,019 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:26:20,057 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:20,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:20,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:20,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307569251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:20,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:20,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:26:20,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927295431] [2022-01-18 15:26:20,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:20,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:26:20,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:26:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:26:20,062 INFO L87 Difference]: Start difference. First operand 506 states and 1538 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) [2022-01-18 15:26:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:20,496 INFO L93 Difference]: Finished difference Result 774 states and 2250 transitions. [2022-01-18 15:26:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:20,496 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 [2022-01-18 15:26:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:20,497 INFO L225 Difference]: With dead ends: 774 [2022-01-18 15:26:20,497 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 15:26:20,497 INFO L932 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 [2022-01-18 15:26:20,497 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 144 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:20,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 172 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:26:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 15:26:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 502. [2022-01-18 15:26:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.0459081836327346) internal successors, (1526), 501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1526 transitions. [2022-01-18 15:26:20,504 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1526 transitions. Word has length 22 [2022-01-18 15:26:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:20,504 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1526 transitions. [2022-01-18 15:26:20,504 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) [2022-01-18 15:26:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1526 transitions. [2022-01-18 15:26:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:20,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:20,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:20,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:20,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 15:26:20,721 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1687399163, now seen corresponding path program 198 times [2022-01-18 15:26:20,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996043908] [2022-01-18 15:26:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:20,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:20,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996043908] [2022-01-18 15:26:20,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996043908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286472815] [2022-01-18 15:26:20,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:20,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:20,824 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) [2022-01-18 15:26:20,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:26:21,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:21,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:21,133 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 29 treesize of output 23 [2022-01-18 15:26:21,273 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 55 treesize of output 43 [2022-01-18 15:26:21,275 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 47 treesize of output 37 [2022-01-18 15:26:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:21,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:21,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:21,553 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 18 treesize of output 22 [2022-01-18 15:26:21,624 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:21,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:21,626 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 [2022-01-18 15:26:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:21,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286472815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:21,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:21,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:26:21,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243002251] [2022-01-18 15:26:21,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:21,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:26:21,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:26:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:21,631 INFO L87 Difference]: Start difference. First operand 502 states and 1526 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) [2022-01-18 15:26:22,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:22,012 INFO L93 Difference]: Finished difference Result 752 states and 2202 transitions. [2022-01-18 15:26:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:26:22,012 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 [2022-01-18 15:26:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:22,013 INFO L225 Difference]: With dead ends: 752 [2022-01-18 15:26:22,013 INFO L226 Difference]: Without dead ends: 752 [2022-01-18 15:26:22,013 INFO L932 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 [2022-01-18 15:26:22,013 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:22,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 211 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:26:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-18 15:26:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 507. [2022-01-18 15:26:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.041501976284585) internal successors, (1539), 506 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1539 transitions. [2022-01-18 15:26:22,019 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1539 transitions. Word has length 22 [2022-01-18 15:26:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:22,020 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1539 transitions. [2022-01-18 15:26:22,020 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) [2022-01-18 15:26:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1539 transitions. [2022-01-18 15:26:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:22,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:22,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:22,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:22,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:22,224 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1112965169, now seen corresponding path program 199 times [2022-01-18 15:26:22,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:22,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824067964] [2022-01-18 15:26:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:22,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:22,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824067964] [2022-01-18 15:26:22,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824067964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281930662] [2022-01-18 15:26:22,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:22,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:22,294 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) [2022-01-18 15:26:22,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:26:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:22,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:22,572 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 [2022-01-18 15:26:22,665 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 55 treesize of output 43 [2022-01-18 15:26:22,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:22,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:22,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:22,832 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:26:22,885 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:22,885 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 8 treesize of output 7 [2022-01-18 15:26:22,886 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 [2022-01-18 15:26:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:22,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281930662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:22,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:22,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:22,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495272538] [2022-01-18 15:26:22,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:22,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:22,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:22,890 INFO L87 Difference]: Start difference. First operand 507 states and 1539 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) [2022-01-18 15:26:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:23,159 INFO L93 Difference]: Finished difference Result 727 states and 2143 transitions. [2022-01-18 15:26:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:23,159 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 [2022-01-18 15:26:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:23,160 INFO L225 Difference]: With dead ends: 727 [2022-01-18 15:26:23,160 INFO L226 Difference]: Without dead ends: 717 [2022-01-18 15:26:23,161 INFO L932 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 [2022-01-18 15:26:23,161 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:23,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 230 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-18 15:26:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 486. [2022-01-18 15:26:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.022680412371134) internal successors, (1466), 485 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1466 transitions. [2022-01-18 15:26:23,166 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1466 transitions. Word has length 22 [2022-01-18 15:26:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:23,167 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1466 transitions. [2022-01-18 15:26:23,167 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) [2022-01-18 15:26:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1466 transitions. [2022-01-18 15:26:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:23,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:23,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:23,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:23,386 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,SelfDestructingSolverStorable215 [2022-01-18 15:26:23,387 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1638885455, now seen corresponding path program 200 times [2022-01-18 15:26:23,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:23,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566994634] [2022-01-18 15:26:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:23,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:23,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566994634] [2022-01-18 15:26:23,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566994634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259162729] [2022-01-18 15:26:23,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:23,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:23,484 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) [2022-01-18 15:26:23,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:26:23,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:23,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:23,761 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 29 treesize of output 23 [2022-01-18 15:26:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:23,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:23,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:23,975 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 18 treesize of output 22 [2022-01-18 15:26:24,020 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:24,020 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 8 treesize of output 7 [2022-01-18 15:26:24,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:24,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259162729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:24,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:24,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:24,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132548931] [2022-01-18 15:26:24,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:24,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:24,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:24,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:24,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:24,025 INFO L87 Difference]: Start difference. First operand 486 states and 1466 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) [2022-01-18 15:26:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:24,350 INFO L93 Difference]: Finished difference Result 657 states and 1955 transitions. [2022-01-18 15:26:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:24,351 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 [2022-01-18 15:26:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:24,351 INFO L225 Difference]: With dead ends: 657 [2022-01-18 15:26:24,352 INFO L226 Difference]: Without dead ends: 657 [2022-01-18 15:26:24,352 INFO L932 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 [2022-01-18 15:26:24,352 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:24,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 196 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-18 15:26:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 483. [2022-01-18 15:26:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0228215767634854) internal successors, (1457), 482 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1457 transitions. [2022-01-18 15:26:24,357 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1457 transitions. Word has length 22 [2022-01-18 15:26:24,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:24,357 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1457 transitions. [2022-01-18 15:26:24,357 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) [2022-01-18 15:26:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1457 transitions. [2022-01-18 15:26:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:24,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:24,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:24,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:24,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:24,567 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1132668067, now seen corresponding path program 201 times [2022-01-18 15:26:24,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703496655] [2022-01-18 15:26:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:24,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:24,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703496655] [2022-01-18 15:26:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703496655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106355799] [2022-01-18 15:26:24,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:24,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:24,629 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) [2022-01-18 15:26:24,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:26:24,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:26:24,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:26:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:24,849 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 17 treesize of output 13 [2022-01-18 15:26:24,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:24,947 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 157 treesize of output 137 [2022-01-18 15:26:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:25,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:25,259 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 263 treesize of output 231 [2022-01-18 15:26:25,428 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:25,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:25,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:26:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106355799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:25,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:25,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-01-18 15:26:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849064966] [2022-01-18 15:26:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:25,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:26:25,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:26:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:26:25,433 INFO L87 Difference]: Start difference. First operand 483 states and 1457 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) [2022-01-18 15:26:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:25,740 INFO L93 Difference]: Finished difference Result 974 states and 2803 transitions. [2022-01-18 15:26:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:26:25,740 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 [2022-01-18 15:26:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:25,742 INFO L225 Difference]: With dead ends: 974 [2022-01-18 15:26:25,742 INFO L226 Difference]: Without dead ends: 923 [2022-01-18 15:26:25,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:26:25,742 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:25,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 195 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-18 15:26:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 481. [2022-01-18 15:26:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0166666666666666) internal successors, (1448), 480 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1448 transitions. [2022-01-18 15:26:25,748 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1448 transitions. Word has length 22 [2022-01-18 15:26:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:25,748 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1448 transitions. [2022-01-18 15:26:25,748 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) [2022-01-18 15:26:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1448 transitions. [2022-01-18 15:26:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:25,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:25,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:25,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:25,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 15:26:25,965 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1085469925, now seen corresponding path program 202 times [2022-01-18 15:26:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504175830] [2022-01-18 15:26:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:25,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:26,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504175830] [2022-01-18 15:26:26,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504175830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247633451] [2022-01-18 15:26:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:26,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:26,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:26,028 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) [2022-01-18 15:26:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:26:26,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:26,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:26,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:26,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:26,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:26,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:26,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:26,710 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 18 treesize of output 22 [2022-01-18 15:26:26,782 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:26,782 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 15:26:26,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:26,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247633451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:26,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:26,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:26,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240323646] [2022-01-18 15:26:26,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:26,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:26,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:26,788 INFO L87 Difference]: Start difference. First operand 481 states and 1448 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) [2022-01-18 15:26:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:27,066 INFO L93 Difference]: Finished difference Result 663 states and 1924 transitions. [2022-01-18 15:26:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:27,066 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 [2022-01-18 15:26:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:27,067 INFO L225 Difference]: With dead ends: 663 [2022-01-18 15:26:27,067 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 15:26:27,067 INFO L932 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 [2022-01-18 15:26:27,067 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 148 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:27,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 15:26:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 489. [2022-01-18 15:26:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0040983606557377) internal successors, (1466), 488 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1466 transitions. [2022-01-18 15:26:27,073 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1466 transitions. Word has length 22 [2022-01-18 15:26:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:27,073 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1466 transitions. [2022-01-18 15:26:27,073 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) [2022-01-18 15:26:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1466 transitions. [2022-01-18 15:26:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:27,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:27,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:27,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:27,282 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,SelfDestructingSolverStorable218 [2022-01-18 15:26:27,283 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1049870599, now seen corresponding path program 203 times [2022-01-18 15:26:27,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:27,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126383995] [2022-01-18 15:26:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:27,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:27,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:27,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126383995] [2022-01-18 15:26:27,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126383995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:27,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22674551] [2022-01-18 15:26:27,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:27,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:27,372 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) [2022-01-18 15:26:27,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:26:27,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:26:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:27,709 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 29 treesize of output 23 [2022-01-18 15:26:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:27,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:27,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:27,996 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 18 treesize of output 22 [2022-01-18 15:26:28,055 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:28,055 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 8 treesize of output 7 [2022-01-18 15:26:28,057 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 [2022-01-18 15:26:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22674551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:28,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:28,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:28,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375824875] [2022-01-18 15:26:28,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:28,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:28,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:28,062 INFO L87 Difference]: Start difference. First operand 489 states and 1466 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) [2022-01-18 15:26:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:28,290 INFO L93 Difference]: Finished difference Result 616 states and 1829 transitions. [2022-01-18 15:26:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:26:28,290 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 [2022-01-18 15:26:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:28,291 INFO L225 Difference]: With dead ends: 616 [2022-01-18 15:26:28,291 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 15:26:28,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:28,291 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:28,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 169 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 15:26:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 456. [2022-01-18 15:26:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.002197802197802) internal successors, (1366), 455 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1366 transitions. [2022-01-18 15:26:28,296 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1366 transitions. Word has length 22 [2022-01-18 15:26:28,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:28,297 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1366 transitions. [2022-01-18 15:26:28,297 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) [2022-01-18 15:26:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1366 transitions. [2022-01-18 15:26:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:28,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:28,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:28,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:28,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:28,511 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2103683403, now seen corresponding path program 204 times [2022-01-18 15:26:28,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471273320] [2022-01-18 15:26:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:28,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:28,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471273320] [2022-01-18 15:26:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471273320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861773243] [2022-01-18 15:26:28,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:28,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:28,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:28,567 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) [2022-01-18 15:26:28,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:26:28,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:26:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:28,829 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 29 treesize of output 23 [2022-01-18 15:26:28,900 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 20 treesize of output 14 [2022-01-18 15:26:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:28,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:29,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:29,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:29,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:29,033 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 12 treesize of output 16 [2022-01-18 15:26:29,039 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:29,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:29,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861773243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:29,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:29,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-18 15:26:29,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316505972] [2022-01-18 15:26:29,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:29,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:26:29,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:26:29,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:26:29,043 INFO L87 Difference]: Start difference. First operand 456 states and 1366 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) [2022-01-18 15:26:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:30,389 INFO L93 Difference]: Finished difference Result 1667 states and 4787 transitions. [2022-01-18 15:26:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:26:30,389 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 [2022-01-18 15:26:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:30,391 INFO L225 Difference]: With dead ends: 1667 [2022-01-18 15:26:30,391 INFO L226 Difference]: Without dead ends: 1517 [2022-01-18 15:26:30,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=658, Invalid=2764, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:26:30,392 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 315 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:30,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 566 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:26:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-01-18 15:26:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 486. [2022-01-18 15:26:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.02680412371134) internal successors, (1468), 485 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1468 transitions. [2022-01-18 15:26:30,412 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1468 transitions. Word has length 22 [2022-01-18 15:26:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:30,413 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1468 transitions. [2022-01-18 15:26:30,413 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) [2022-01-18 15:26:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1468 transitions. [2022-01-18 15:26:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:30,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:30,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:30,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-01-18 15:26:30,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:30,633 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:30,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1885422411, now seen corresponding path program 205 times [2022-01-18 15:26:30,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:30,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183614509] [2022-01-18 15:26:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:30,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:30,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183614509] [2022-01-18 15:26:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183614509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010509296] [2022-01-18 15:26:30,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:30,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:30,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:30,704 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) [2022-01-18 15:26:30,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:26:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:30,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:31,020 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 29 treesize of output 23 [2022-01-18 15:26:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:31,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:31,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:31,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:31,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:31,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:31,384 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:31,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010509296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:31,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:31,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 15:26:31,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497336848] [2022-01-18 15:26:31,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:31,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:31,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:31,391 INFO L87 Difference]: Start difference. First operand 486 states and 1468 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) [2022-01-18 15:26:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:32,669 INFO L93 Difference]: Finished difference Result 1454 states and 4222 transitions. [2022-01-18 15:26:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:26:32,669 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 [2022-01-18 15:26:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:32,671 INFO L225 Difference]: With dead ends: 1454 [2022-01-18 15:26:32,671 INFO L226 Difference]: Without dead ends: 1352 [2022-01-18 15:26:32,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=2398, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:26:32,671 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 192 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:32,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 579 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:26:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-01-18 15:26:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 450. [2022-01-18 15:26:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.002227171492205) internal successors, (1348), 449 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1348 transitions. [2022-01-18 15:26:32,679 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1348 transitions. Word has length 22 [2022-01-18 15:26:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:32,679 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1348 transitions. [2022-01-18 15:26:32,679 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) [2022-01-18 15:26:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1348 transitions. [2022-01-18 15:26:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:32,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:32,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:32,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:32,895 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,SelfDestructingSolverStorable221 [2022-01-18 15:26:32,896 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2078687993, now seen corresponding path program 206 times [2022-01-18 15:26:32,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:32,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618101803] [2022-01-18 15:26:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:32,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:33,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618101803] [2022-01-18 15:26:33,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618101803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177872834] [2022-01-18 15:26:33,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:33,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:33,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:33,006 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) [2022-01-18 15:26:33,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:26:33,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:33,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:33,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:33,385 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 43 treesize of output 33 [2022-01-18 15:26:33,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:33,446 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 22 treesize of output 16 [2022-01-18 15:26:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:33,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:33,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:33,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:33,618 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 47 treesize of output 45 [2022-01-18 15:26:33,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:33,791 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 15:26:33,802 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:33,802 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 7 treesize of output 3 [2022-01-18 15:26:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:33,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177872834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:33,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:33,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:33,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585596894] [2022-01-18 15:26:33,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:33,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:33,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:33,812 INFO L87 Difference]: Start difference. First operand 450 states and 1348 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) [2022-01-18 15:26:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:34,256 INFO L93 Difference]: Finished difference Result 878 states and 2552 transitions. [2022-01-18 15:26:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:26:34,257 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 [2022-01-18 15:26:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:34,258 INFO L225 Difference]: With dead ends: 878 [2022-01-18 15:26:34,258 INFO L226 Difference]: Without dead ends: 811 [2022-01-18 15:26:34,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:26:34,258 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 162 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:34,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 280 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 639 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-01-18 15:26:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-18 15:26:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 457. [2022-01-18 15:26:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.017543859649123) internal successors, (1376), 456 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1376 transitions. [2022-01-18 15:26:34,264 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1376 transitions. Word has length 22 [2022-01-18 15:26:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:34,264 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1376 transitions. [2022-01-18 15:26:34,264 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) [2022-01-18 15:26:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1376 transitions. [2022-01-18 15:26:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:34,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:34,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:34,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:34,464 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,SelfDestructingSolverStorable222 [2022-01-18 15:26:34,465 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:34,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1709203663, now seen corresponding path program 207 times [2022-01-18 15:26:34,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:34,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225417858] [2022-01-18 15:26:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:34,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:34,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225417858] [2022-01-18 15:26:34,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225417858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390271511] [2022-01-18 15:26:34,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:34,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:34,592 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) [2022-01-18 15:26:34,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:26:34,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:26:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:34,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:34,973 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 43 treesize of output 33 [2022-01-18 15:26:35,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:35,020 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 15:26:35,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:35,022 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 15:26:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:35,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:35,173 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 15:26:35,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:35,352 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 12 treesize of output 16 [2022-01-18 15:26:35,361 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:35,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:35,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390271511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:35,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:35,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 15:26:35,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802786071] [2022-01-18 15:26:35,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:35,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:35,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:35,371 INFO L87 Difference]: Start difference. First operand 457 states and 1376 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) [2022-01-18 15:26:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:35,667 INFO L93 Difference]: Finished difference Result 673 states and 2000 transitions. [2022-01-18 15:26:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:26:35,667 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 [2022-01-18 15:26:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:35,669 INFO L225 Difference]: With dead ends: 673 [2022-01-18 15:26:35,669 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 15:26:35,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:26:35,669 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:35,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 203 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 444 Invalid, 0 Unknown, 343 Unchecked, 0.1s Time] [2022-01-18 15:26:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 15:26:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 469. [2022-01-18 15:26:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0235042735042734) internal successors, (1415), 468 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1415 transitions. [2022-01-18 15:26:35,677 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1415 transitions. Word has length 22 [2022-01-18 15:26:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:35,678 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1415 transitions. [2022-01-18 15:26:35,678 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) [2022-01-18 15:26:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1415 transitions. [2022-01-18 15:26:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:35,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:35,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:35,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:35,891 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,SelfDestructingSolverStorable223 [2022-01-18 15:26:35,891 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -696511131, now seen corresponding path program 208 times [2022-01-18 15:26:35,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:35,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500169002] [2022-01-18 15:26:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:35,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:36,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500169002] [2022-01-18 15:26:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500169002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394478801] [2022-01-18 15:26:36,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:36,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:36,023 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) [2022-01-18 15:26:36,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:26:36,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:36,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:36,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:36,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:36,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:36,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:36,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:36,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:36,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:36,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:36,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:36,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:36,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:36,611 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 [2022-01-18 15:26:36,617 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:36,618 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 [2022-01-18 15:26:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:36,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394478801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:36,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:36,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 15:26:36,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249029307] [2022-01-18 15:26:36,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:36,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:36,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:36,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:36,624 INFO L87 Difference]: Start difference. First operand 469 states and 1415 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) [2022-01-18 15:26:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:36,957 INFO L93 Difference]: Finished difference Result 640 states and 1911 transitions. [2022-01-18 15:26:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:26:36,958 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 [2022-01-18 15:26:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:36,959 INFO L225 Difference]: With dead ends: 640 [2022-01-18 15:26:36,959 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 15:26:36,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:26:36,959 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:36,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 196 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 497 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-01-18 15:26:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 15:26:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 490. [2022-01-18 15:26:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.0245398773006134) internal successors, (1479), 489 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1479 transitions. [2022-01-18 15:26:36,965 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1479 transitions. Word has length 22 [2022-01-18 15:26:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:36,965 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1479 transitions. [2022-01-18 15:26:36,965 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) [2022-01-18 15:26:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1479 transitions. [2022-01-18 15:26:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:36,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:36,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:36,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 15:26:37,167 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash -153837659, now seen corresponding path program 209 times [2022-01-18 15:26:37,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129966119] [2022-01-18 15:26:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:37,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:37,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129966119] [2022-01-18 15:26:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129966119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957083110] [2022-01-18 15:26:37,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:37,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:37,301 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) [2022-01-18 15:26:37,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:26:37,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:37,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:37,631 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 43 treesize of output 33 [2022-01-18 15:26:37,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:37,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:37,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:37,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:37,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:37,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:37,833 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 12 treesize of output 16 [2022-01-18 15:26:37,839 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:37,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:37,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957083110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:37,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:37,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 15:26:37,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46201183] [2022-01-18 15:26:37,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:37,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:37,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:37,845 INFO L87 Difference]: Start difference. First operand 490 states and 1479 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-01-18 15:26:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:38,149 INFO L93 Difference]: Finished difference Result 677 states and 2005 transitions. [2022-01-18 15:26:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:26:38,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 22 [2022-01-18 15:26:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:38,150 INFO L225 Difference]: With dead ends: 677 [2022-01-18 15:26:38,150 INFO L226 Difference]: Without dead ends: 658 [2022-01-18 15:26:38,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:26:38,151 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:38,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 186 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 447 Invalid, 0 Unknown, 324 Unchecked, 0.1s Time] [2022-01-18 15:26:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-18 15:26:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 493. [2022-01-18 15:26:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.0101626016260163) internal successors, (1481), 492 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1481 transitions. [2022-01-18 15:26:38,158 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1481 transitions. Word has length 22 [2022-01-18 15:26:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1481 transitions. [2022-01-18 15:26:38,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-01-18 15:26:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1481 transitions. [2022-01-18 15:26:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:38,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:38,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:38,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:38,382 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,SelfDestructingSolverStorable225 [2022-01-18 15:26:38,382 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -668967865, now seen corresponding path program 210 times [2022-01-18 15:26:38,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:38,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338831952] [2022-01-18 15:26:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:38,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:38,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:38,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338831952] [2022-01-18 15:26:38,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338831952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:38,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643384106] [2022-01-18 15:26:38,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:38,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:38,485 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) [2022-01-18 15:26:38,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:26:38,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:26:38,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:38,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:38,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:38,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:38,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:38,911 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 15:26:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:38,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:39,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:39,076 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 18 treesize of output 22 [2022-01-18 15:26:39,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:39,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:39,168 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:39,168 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 7 treesize of output 3 [2022-01-18 15:26:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643384106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:39,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:26:39,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320110909] [2022-01-18 15:26:39,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:39,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:26:39,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:26:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:26:39,179 INFO L87 Difference]: Start difference. First operand 493 states and 1481 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) [2022-01-18 15:26:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:39,450 INFO L93 Difference]: Finished difference Result 758 states and 2260 transitions. [2022-01-18 15:26:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:26:39,450 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 [2022-01-18 15:26:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:39,451 INFO L225 Difference]: With dead ends: 758 [2022-01-18 15:26:39,451 INFO L226 Difference]: Without dead ends: 758 [2022-01-18 15:26:39,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:26:39,451 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:39,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 157 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 512 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-18 15:26:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-01-18 15:26:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 507. [2022-01-18 15:26:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.0019762845849804) internal successors, (1519), 506 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1519 transitions. [2022-01-18 15:26:39,457 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1519 transitions. Word has length 22 [2022-01-18 15:26:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:39,457 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1519 transitions. [2022-01-18 15:26:39,457 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) [2022-01-18 15:26:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1519 transitions. [2022-01-18 15:26:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:39,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:39,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:39,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 15:26:39,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:39,674 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2081104959, now seen corresponding path program 211 times [2022-01-18 15:26:39,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:39,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318993394] [2022-01-18 15:26:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:39,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:39,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:39,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318993394] [2022-01-18 15:26:39,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318993394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:39,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380743233] [2022-01-18 15:26:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:39,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:39,758 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) [2022-01-18 15:26:39,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:26:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:39,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:40,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:40,106 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 22 treesize of output 16 [2022-01-18 15:26:40,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:40,178 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 15:26:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:40,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:40,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:40,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:40,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:40,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:40,366 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:40,366 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 7 treesize of output 3 [2022-01-18 15:26:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:40,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380743233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:40,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:40,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-18 15:26:40,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160221175] [2022-01-18 15:26:40,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:40,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:26:40,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:26:40,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:26:40,374 INFO L87 Difference]: Start difference. First operand 507 states and 1519 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) [2022-01-18 15:26:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:40,662 INFO L93 Difference]: Finished difference Result 906 states and 2618 transitions. [2022-01-18 15:26:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:26:40,662 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 [2022-01-18 15:26:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:40,663 INFO L225 Difference]: With dead ends: 906 [2022-01-18 15:26:40,663 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 15:26:40,663 INFO L932 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 [2022-01-18 15:26:40,663 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:40,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 245 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 942 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-18 15:26:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 15:26:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 513. [2022-01-18 15:26:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.99609375) internal successors, (1534), 512 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1534 transitions. [2022-01-18 15:26:40,669 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1534 transitions. Word has length 22 [2022-01-18 15:26:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:40,669 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1534 transitions. [2022-01-18 15:26:40,669 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) [2022-01-18 15:26:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1534 transitions. [2022-01-18 15:26:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:40,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:40,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:40,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:40,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:40,886 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash -450706873, now seen corresponding path program 212 times [2022-01-18 15:26:40,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:40,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019210169] [2022-01-18 15:26:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:40,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:40,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019210169] [2022-01-18 15:26:40,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019210169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956652823] [2022-01-18 15:26:40,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:40,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:40,943 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) [2022-01-18 15:26:40,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:26:41,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:41,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:41,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:41,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:41,309 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 15:26:41,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:41,409 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 15:26:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:41,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:41,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:41,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:41,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:41,649 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 15:26:41,659 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:41,659 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 7 treesize of output 3 [2022-01-18 15:26:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:41,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956652823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:41,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:41,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:41,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078387243] [2022-01-18 15:26:41,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:41,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:41,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:41,670 INFO L87 Difference]: Start difference. First operand 513 states and 1534 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) [2022-01-18 15:26:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:42,141 INFO L93 Difference]: Finished difference Result 766 states and 2222 transitions. [2022-01-18 15:26:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:26:42,141 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 [2022-01-18 15:26:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:42,142 INFO L225 Difference]: With dead ends: 766 [2022-01-18 15:26:42,142 INFO L226 Difference]: Without dead ends: 699 [2022-01-18 15:26:42,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:26:42,143 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:42,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 272 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1022 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-01-18 15:26:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-18 15:26:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 461. [2022-01-18 15:26:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.95) internal successors, (1357), 460 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1357 transitions. [2022-01-18 15:26:42,148 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1357 transitions. Word has length 22 [2022-01-18 15:26:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:42,148 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1357 transitions. [2022-01-18 15:26:42,148 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) [2022-01-18 15:26:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1357 transitions. [2022-01-18 15:26:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:42,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:42,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:42,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-18 15:26:42,365 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,SelfDestructingSolverStorable228 [2022-01-18 15:26:42,366 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash 307691045, now seen corresponding path program 213 times [2022-01-18 15:26:42,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408452143] [2022-01-18 15:26:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:42,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:42,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408452143] [2022-01-18 15:26:42,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408452143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754004968] [2022-01-18 15:26:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:42,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:42,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:42,476 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) [2022-01-18 15:26:42,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:26:42,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:26:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:42,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:42,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:42,876 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 31 treesize of output 23 [2022-01-18 15:26:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:42,878 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 22 treesize of output 16 [2022-01-18 15:26:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:42,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:42,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:42,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:43,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:43,081 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 12 treesize of output 16 [2022-01-18 15:26:43,087 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:43,087 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 7 treesize of output 3 [2022-01-18 15:26:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:43,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754004968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:43,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:43,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:26:43,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239032000] [2022-01-18 15:26:43,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:43,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:26:43,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:26:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:43,093 INFO L87 Difference]: Start difference. First operand 461 states and 1357 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) [2022-01-18 15:26:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:43,397 INFO L93 Difference]: Finished difference Result 818 states and 2330 transitions. [2022-01-18 15:26:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:26:43,397 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 [2022-01-18 15:26:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:43,398 INFO L225 Difference]: With dead ends: 818 [2022-01-18 15:26:43,398 INFO L226 Difference]: Without dead ends: 797 [2022-01-18 15:26:43,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:26:43,398 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 112 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 303 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 686 Invalid, 0 Unknown, 293 Unchecked, 0.2s Time] [2022-01-18 15:26:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-18 15:26:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 459. [2022-01-18 15:26:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2022-01-18 15:26:43,404 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 22 [2022-01-18 15:26:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:43,404 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2022-01-18 15:26:43,404 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) [2022-01-18 15:26:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2022-01-18 15:26:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:43,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:43,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:43,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:43,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:43,610 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1748170839, now seen corresponding path program 214 times [2022-01-18 15:26:43,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143772373] [2022-01-18 15:26:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:43,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:43,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:43,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143772373] [2022-01-18 15:26:43,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143772373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:43,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120885415] [2022-01-18 15:26:43,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:43,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:43,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:43,685 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) [2022-01-18 15:26:43,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:26:43,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:43,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:44,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:44,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:44,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:44,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:44,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:44,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:44,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:44,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:44,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:44,291 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:44,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:44,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120885415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:44,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:44,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:26:44,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587082060] [2022-01-18 15:26:44,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:44,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:26:44,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:26:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:26:44,302 INFO L87 Difference]: Start difference. First operand 459 states and 1352 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) [2022-01-18 15:26:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:44,937 INFO L93 Difference]: Finished difference Result 939 states and 2650 transitions. [2022-01-18 15:26:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:26:44,938 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 [2022-01-18 15:26:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:44,939 INFO L225 Difference]: With dead ends: 939 [2022-01-18 15:26:44,939 INFO L226 Difference]: Without dead ends: 843 [2022-01-18 15:26:44,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:26:44,939 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 163 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:44,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 321 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:26:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-18 15:26:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 439. [2022-01-18 15:26:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.9292237442922375) internal successors, (1283), 438 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1283 transitions. [2022-01-18 15:26:44,945 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1283 transitions. Word has length 22 [2022-01-18 15:26:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:44,945 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1283 transitions. [2022-01-18 15:26:44,945 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) [2022-01-18 15:26:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1283 transitions. [2022-01-18 15:26:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:44,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:44,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:44,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:45,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:45,155 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:45,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1027565477, now seen corresponding path program 215 times [2022-01-18 15:26:45,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:45,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947429222] [2022-01-18 15:26:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:45,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:45,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947429222] [2022-01-18 15:26:45,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947429222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512184599] [2022-01-18 15:26:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:45,264 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) [2022-01-18 15:26:45,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:26:45,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:26:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:45,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:45,646 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 43 treesize of output 33 [2022-01-18 15:26:45,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:45,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:45,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:45,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:45,821 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 42 treesize of output 40 [2022-01-18 15:26:45,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:45,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:45,970 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:45,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:26:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:45,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512184599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:45,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:45,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:26:45,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516487670] [2022-01-18 15:26:45,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:45,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:26:45,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:26:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:26:45,980 INFO L87 Difference]: Start difference. First operand 439 states and 1283 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2022-01-18 15:26:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:46,542 INFO L93 Difference]: Finished difference Result 742 states and 2126 transitions. [2022-01-18 15:26:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:26:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 [2022-01-18 15:26:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:46,543 INFO L225 Difference]: With dead ends: 742 [2022-01-18 15:26:46,543 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 15:26:46,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:26:46,544 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:46,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 317 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 570 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-01-18 15:26:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 15:26:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 445. [2022-01-18 15:26:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.936936936936937) internal successors, (1304), 444 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1304 transitions. [2022-01-18 15:26:46,548 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1304 transitions. Word has length 22 [2022-01-18 15:26:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:46,548 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1304 transitions. [2022-01-18 15:26:46,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2022-01-18 15:26:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1304 transitions. [2022-01-18 15:26:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:26:46,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:46,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:46,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:46,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:46,759 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1417696077, now seen corresponding path program 216 times [2022-01-18 15:26:46,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113177272] [2022-01-18 15:26:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:46,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:46,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113177272] [2022-01-18 15:26:46,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113177272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558020133] [2022-01-18 15:26:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:46,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:46,841 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) [2022-01-18 15:26:46,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:26:47,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:47,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:47,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:26:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:47,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:47,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:47,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:47,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:47,548 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 12 treesize of output 16 [2022-01-18 15:26:47,557 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 15:26:47,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:47,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558020133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:47,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:47,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:26:47,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171474885] [2022-01-18 15:26:47,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:47,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:26:47,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:47,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:26:47,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:26:47,568 INFO L87 Difference]: Start difference. First operand 445 states and 1304 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) [2022-01-18 15:26:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:48,131 INFO L93 Difference]: Finished difference Result 749 states and 2142 transitions. [2022-01-18 15:26:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:26:48,131 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 22 [2022-01-18 15:26:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:48,132 INFO L225 Difference]: With dead ends: 749 [2022-01-18 15:26:48,132 INFO L226 Difference]: Without dead ends: 615 [2022-01-18 15:26:48,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:26:48,132 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:48,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 243 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:26:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-18 15:26:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 411. [2022-01-18 15:26:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.9170731707317072) internal successors, (1196), 410 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1196 transitions. [2022-01-18 15:26:48,137 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1196 transitions. Word has length 22 [2022-01-18 15:26:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:48,137 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1196 transitions. [2022-01-18 15:26:48,137 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) [2022-01-18 15:26:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1196 transitions. [2022-01-18 15:26:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:26:48,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:48,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:48,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:48,347 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,SelfDestructingSolverStorable232 [2022-01-18 15:26:48,347 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2020815505, now seen corresponding path program 217 times [2022-01-18 15:26:48,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:48,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642840171] [2022-01-18 15:26:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:48,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:26:48,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:48,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642840171] [2022-01-18 15:26:48,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642840171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:48,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012363892] [2022-01-18 15:26:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:48,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:48,452 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) [2022-01-18 15:26:48,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:26:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:26:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:48,805 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 294 treesize of output 250 [2022-01-18 15:26:49,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:49,138 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 202 treesize of output 174 [2022-01-18 15:26:49,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:26:49,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:49,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:49,966 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:49,967 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 237 [2022-01-18 15:26:49,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:26:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:26:50,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012363892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:50,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:50,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:26:50,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967219414] [2022-01-18 15:26:50,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:50,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:26:50,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:26:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:26:50,173 INFO L87 Difference]: Start difference. First operand 411 states and 1196 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) [2022-01-18 15:26:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:51,055 INFO L93 Difference]: Finished difference Result 839 states and 2488 transitions. [2022-01-18 15:26:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:26:51,056 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 [2022-01-18 15:26:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:51,057 INFO L225 Difference]: With dead ends: 839 [2022-01-18 15:26:51,057 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 15:26:51,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:26:51,057 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 291 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:51,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 286 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 769 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2022-01-18 15:26:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 15:26:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 440. [2022-01-18 15:26:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.002277904328018) internal successors, (1318), 439 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1318 transitions. [2022-01-18 15:26:51,063 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1318 transitions. Word has length 23 [2022-01-18 15:26:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:51,063 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1318 transitions. [2022-01-18 15:26:51,063 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) [2022-01-18 15:26:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1318 transitions. [2022-01-18 15:26:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:26:51,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:51,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:51,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 15:26:51,267 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,SelfDestructingSolverStorable233 [2022-01-18 15:26:51,267 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1499006063, now seen corresponding path program 218 times [2022-01-18 15:26:51,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:51,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267285050] [2022-01-18 15:26:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:51,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:51,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:51,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267285050] [2022-01-18 15:26:51,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267285050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:51,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025481827] [2022-01-18 15:26:51,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:51,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:51,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:51,440 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) [2022-01-18 15:26:51,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:26:51,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:51,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:26:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:51,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:52,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:52,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 196 treesize of output 168 [2022-01-18 15:26:52,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:26:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:52,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:52,741 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 188 treesize of output 164 [2022-01-18 15:26:53,096 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 [2022-01-18 15:26:53,103 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:53,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:26:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025481827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:53,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:53,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:26:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514744440] [2022-01-18 15:26:53,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:53,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:53,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:53,221 INFO L87 Difference]: Start difference. First operand 440 states and 1318 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) [2022-01-18 15:26:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:55,265 INFO L93 Difference]: Finished difference Result 1018 states and 3114 transitions. [2022-01-18 15:26:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:26:55,265 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 [2022-01-18 15:26:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:55,267 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 15:26:55,267 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 15:26:55,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=640, Invalid=3392, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:26:55,267 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 316 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:55,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 482 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 875 Invalid, 0 Unknown, 531 Unchecked, 0.4s Time] [2022-01-18 15:26:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 15:26:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 499. [2022-01-18 15:26:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.112449799196787) internal successors, (1550), 498 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1550 transitions. [2022-01-18 15:26:55,274 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1550 transitions. Word has length 23 [2022-01-18 15:26:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:55,274 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1550 transitions. [2022-01-18 15:26:55,274 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) [2022-01-18 15:26:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1550 transitions. [2022-01-18 15:26:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:26:55,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:55,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:55,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:55,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 15:26:55,482 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1703477295, now seen corresponding path program 219 times [2022-01-18 15:26:55,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:55,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161930195] [2022-01-18 15:26:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:55,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:55,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:55,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161930195] [2022-01-18 15:26:55,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161930195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:55,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787669162] [2022-01-18 15:26:55,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:55,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:55,768 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) [2022-01-18 15:26:55,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:26:56,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:26:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:26:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:56,101 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 229 treesize of output 201 [2022-01-18 15:26:56,508 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 148 treesize of output 128 [2022-01-18 15:26:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:56,510 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2022-01-18 15:26:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:56,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:57,007 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 306 treesize of output 270 [2022-01-18 15:26:57,266 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:57,266 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 191 treesize of output 168 [2022-01-18 15:26:57,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:26:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:57,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787669162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:57,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:57,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:26:57,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340463089] [2022-01-18 15:26:57,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:57,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:57,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:57,371 INFO L87 Difference]: Start difference. First operand 499 states and 1550 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) [2022-01-18 15:27:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:00,352 INFO L93 Difference]: Finished difference Result 1254 states and 3789 transitions. [2022-01-18 15:27:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:27:00,353 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 [2022-01-18 15:27:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:00,354 INFO L225 Difference]: With dead ends: 1254 [2022-01-18 15:27:00,354 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 15:27:00,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=796, Invalid=5056, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 15:27:00,355 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 543 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:00,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 653 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1738 Invalid, 0 Unknown, 589 Unchecked, 0.6s Time] [2022-01-18 15:27:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 15:27:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 528. [2022-01-18 15:27:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.1840607210626186) internal successors, (1678), 527 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1678 transitions. [2022-01-18 15:27:00,362 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1678 transitions. Word has length 23 [2022-01-18 15:27:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:00,363 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1678 transitions. [2022-01-18 15:27:00,363 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) [2022-01-18 15:27:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1678 transitions. [2022-01-18 15:27:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:00,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:00,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:00,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:00,580 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,SelfDestructingSolverStorable235 [2022-01-18 15:27:00,580 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash 722270827, now seen corresponding path program 220 times [2022-01-18 15:27:00,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:00,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384037419] [2022-01-18 15:27:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:00,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:00,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384037419] [2022-01-18 15:27:00,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384037419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902127867] [2022-01-18 15:27:00,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:27:00,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:00,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:00,694 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) [2022-01-18 15:27:00,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:27:00,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:27:00,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:00,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:00,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:01,527 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 128 treesize of output 112 [2022-01-18 15:27:01,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:01,529 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 139 [2022-01-18 15:27:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:01,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:02,186 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 258 treesize of output 222 [2022-01-18 15:27:02,562 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:02,563 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 15:27:02,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:27:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:02,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902127867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:02,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:02,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:02,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240920327] [2022-01-18 15:27:02,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:02,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:02,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:02,724 INFO L87 Difference]: Start difference. First operand 528 states and 1678 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) [2022-01-18 15:27:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:03,877 INFO L93 Difference]: Finished difference Result 1005 states and 3202 transitions. [2022-01-18 15:27:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:27:03,878 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 [2022-01-18 15:27:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:03,879 INFO L225 Difference]: With dead ends: 1005 [2022-01-18 15:27:03,879 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 15:27:03,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:27:03,879 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 253 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:03,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 434 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 861 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-01-18 15:27:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 15:27:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 558. [2022-01-18 15:27:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.2675044883303412) internal successors, (1820), 557 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1820 transitions. [2022-01-18 15:27:03,886 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1820 transitions. Word has length 23 [2022-01-18 15:27:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:03,886 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1820 transitions. [2022-01-18 15:27:03,886 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) [2022-01-18 15:27:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1820 transitions. [2022-01-18 15:27:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:03,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:03,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:03,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-01-18 15:27:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:04,087 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1011545183, now seen corresponding path program 221 times [2022-01-18 15:27:04,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:04,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325022496] [2022-01-18 15:27:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:04,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:27:04,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:04,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325022496] [2022-01-18 15:27:04,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325022496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:04,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549799701] [2022-01-18 15:27:04,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:27:04,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:04,298 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) [2022-01-18 15:27:04,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:27:04,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:27:04,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:27:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:04,599 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 173 treesize of output 155 [2022-01-18 15:27:05,436 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 165 treesize of output 141 [2022-01-18 15:27:05,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:05,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:05,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:06,197 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 239 treesize of output 203 [2022-01-18 15:27:06,543 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 235 treesize of output 207 [2022-01-18 15:27:06,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:06,550 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 214 treesize of output 191 [2022-01-18 15:27:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:06,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549799701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:06,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:06,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:06,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768762420] [2022-01-18 15:27:06,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:06,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:06,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:06,662 INFO L87 Difference]: Start difference. First operand 558 states and 1820 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) [2022-01-18 15:27:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:10,978 INFO L93 Difference]: Finished difference Result 2134 states and 6587 transitions. [2022-01-18 15:27:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 15:27:10,979 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 [2022-01-18 15:27:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:10,981 INFO L225 Difference]: With dead ends: 2134 [2022-01-18 15:27:10,981 INFO L226 Difference]: Without dead ends: 1744 [2022-01-18 15:27:10,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1178, Invalid=9742, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 15:27:10,982 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 549 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 678 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:10,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1013 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 2365 Invalid, 0 Unknown, 678 Unchecked, 0.8s Time] [2022-01-18 15:27:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-01-18 15:27:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 658. [2022-01-18 15:27:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.450532724505327) internal successors, (2267), 657 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2267 transitions. [2022-01-18 15:27:10,993 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2267 transitions. Word has length 23 [2022-01-18 15:27:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:10,993 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2267 transitions. [2022-01-18 15:27:10,993 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) [2022-01-18 15:27:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2267 transitions. [2022-01-18 15:27:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:10,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:10,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:11,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:11,210 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,SelfDestructingSolverStorable237 [2022-01-18 15:27:11,210 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1321402815, now seen corresponding path program 222 times [2022-01-18 15:27:11,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:11,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967308284] [2022-01-18 15:27:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:11,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:11,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967308284] [2022-01-18 15:27:11,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967308284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551574518] [2022-01-18 15:27:11,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:27:11,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:11,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:11,370 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) [2022-01-18 15:27:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:27:11,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:27:11,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:11,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:11,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:11,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:12,084 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 128 treesize of output 112 [2022-01-18 15:27:12,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:12,086 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 15:27:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:12,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:12,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 213 [2022-01-18 15:27:12,681 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:12,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:27:12,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:27:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:12,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551574518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:12,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:12,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:12,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718199338] [2022-01-18 15:27:12,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:12,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:12,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:12,768 INFO L87 Difference]: Start difference. First operand 658 states and 2267 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) [2022-01-18 15:27:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:14,010 INFO L93 Difference]: Finished difference Result 1401 states and 4450 transitions. [2022-01-18 15:27:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 15:27:14,011 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 [2022-01-18 15:27:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:14,012 INFO L225 Difference]: With dead ends: 1401 [2022-01-18 15:27:14,012 INFO L226 Difference]: Without dead ends: 1196 [2022-01-18 15:27:14,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=3190, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:27:14,013 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 236 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:14,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 841 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1863 Invalid, 0 Unknown, 548 Unchecked, 0.5s Time] [2022-01-18 15:27:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-18 15:27:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 696. [2022-01-18 15:27:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 3.4287769784172664) internal successors, (2383), 695 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2383 transitions. [2022-01-18 15:27:14,022 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2383 transitions. Word has length 23 [2022-01-18 15:27:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 2383 transitions. [2022-01-18 15:27:14,022 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) [2022-01-18 15:27:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2383 transitions. [2022-01-18 15:27:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:14,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:14,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:14,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:14,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 15:27:14,239 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -150983109, now seen corresponding path program 223 times [2022-01-18 15:27:14,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908019515] [2022-01-18 15:27:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:14,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:27:14,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908019515] [2022-01-18 15:27:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908019515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573863312] [2022-01-18 15:27:14,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:27:14,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:14,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:14,527 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) [2022-01-18 15:27:14,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:27:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:27:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:14,829 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 173 treesize of output 149 [2022-01-18 15:27:15,343 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 165 treesize of output 141 [2022-01-18 15:27:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:15,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 164 treesize of output 144 [2022-01-18 15:27:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:15,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:16,077 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 159 treesize of output 139 [2022-01-18 15:27:16,509 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:16,509 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 239 treesize of output 212 [2022-01-18 15:27:16,514 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 211 treesize of output 187 [2022-01-18 15:27:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:16,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573863312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:16,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:16,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-01-18 15:27:16,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522458107] [2022-01-18 15:27:16,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:16,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:27:16,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:27:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:27:16,711 INFO L87 Difference]: Start difference. First operand 696 states and 2383 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2022-01-18 15:27:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:22,028 INFO L93 Difference]: Finished difference Result 1701 states and 5247 transitions. [2022-01-18 15:27:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 15:27:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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 [2022-01-18 15:27:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:22,031 INFO L225 Difference]: With dead ends: 1701 [2022-01-18 15:27:22,031 INFO L226 Difference]: Without dead ends: 1512 [2022-01-18 15:27:22,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1009, Invalid=8303, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:27:22,032 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 313 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:22,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1004 Invalid, 3482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2669 Invalid, 0 Unknown, 686 Unchecked, 1.1s Time] [2022-01-18 15:27:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-01-18 15:27:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 732. [2022-01-18 15:27:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.488372093023256) internal successors, (2550), 731 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2550 transitions. [2022-01-18 15:27:22,043 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2550 transitions. Word has length 23 [2022-01-18 15:27:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:22,043 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2550 transitions. [2022-01-18 15:27:22,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2022-01-18 15:27:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2550 transitions. [2022-01-18 15:27:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:22,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:22,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:22,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 15:27:22,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:22,259 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1782164497, now seen corresponding path program 224 times [2022-01-18 15:27:22,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:22,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31224496] [2022-01-18 15:27:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:22,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:22,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:22,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31224496] [2022-01-18 15:27:22,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31224496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:22,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514234579] [2022-01-18 15:27:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:27:22,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:22,354 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) [2022-01-18 15:27:22,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:27:22,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:27:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:22,713 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 256 treesize of output 224 [2022-01-18 15:27:23,020 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 165 treesize of output 141 [2022-01-18 15:27:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:23,022 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 15:27:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:23,263 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 159 treesize of output 139 [2022-01-18 15:27:23,638 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:23,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 244 [2022-01-18 15:27:23,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-01-18 15:27:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:23,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514234579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:23,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:23,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:27:23,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37586456] [2022-01-18 15:27:23,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:23,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:27:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:27:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:27:23,745 INFO L87 Difference]: Start difference. First operand 732 states and 2550 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2022-01-18 15:27:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:25,059 INFO L93 Difference]: Finished difference Result 1291 states and 4158 transitions. [2022-01-18 15:27:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:27:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 [2022-01-18 15:27:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:25,061 INFO L225 Difference]: With dead ends: 1291 [2022-01-18 15:27:25,061 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 15:27:25,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=337, Invalid=2855, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:27:25,062 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:25,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 662 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1487 Invalid, 0 Unknown, 285 Unchecked, 0.5s Time] [2022-01-18 15:27:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 15:27:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 743. [2022-01-18 15:27:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.4797843665768196) internal successors, (2582), 742 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2582 transitions. [2022-01-18 15:27:25,071 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2582 transitions. Word has length 23 [2022-01-18 15:27:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:25,071 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2582 transitions. [2022-01-18 15:27:25,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2022-01-18 15:27:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2582 transitions. [2022-01-18 15:27:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:25,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:25,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:25,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:25,288 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash -97398047, now seen corresponding path program 225 times [2022-01-18 15:27:25,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:25,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736661971] [2022-01-18 15:27:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:25,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:25,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736661971] [2022-01-18 15:27:25,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736661971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:25,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715607307] [2022-01-18 15:27:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:27:25,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:25,425 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) [2022-01-18 15:27:25,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:27:25,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:27:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:25,755 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 199 treesize of output 183 [2022-01-18 15:27:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:26,021 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 179 treesize of output 153 [2022-01-18 15:27:26,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:26,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:26,289 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 233 treesize of output 209 [2022-01-18 15:27:26,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 220 [2022-01-18 15:27:26,594 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:26,594 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 241 treesize of output 214 [2022-01-18 15:27:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715607307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:26,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:26,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-01-18 15:27:26,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686379161] [2022-01-18 15:27:26,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:26,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:27:26,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:27:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:27:26,697 INFO L87 Difference]: Start difference. First operand 743 states and 2582 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) [2022-01-18 15:27:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:27,154 INFO L93 Difference]: Finished difference Result 1441 states and 4670 transitions. [2022-01-18 15:27:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:27:27,154 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 [2022-01-18 15:27:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:27,156 INFO L225 Difference]: With dead ends: 1441 [2022-01-18 15:27:27,156 INFO L226 Difference]: Without dead ends: 1384 [2022-01-18 15:27:27,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:27:27,156 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 136 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:27,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 330 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-18 15:27:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-01-18 15:27:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 830. [2022-01-18 15:27:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4065138721351027) internal successors, (2824), 829 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2824 transitions. [2022-01-18 15:27:27,167 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2824 transitions. Word has length 23 [2022-01-18 15:27:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:27,167 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2824 transitions. [2022-01-18 15:27:27,167 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) [2022-01-18 15:27:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2824 transitions. [2022-01-18 15:27:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:27,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:27,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:27,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:27,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:27,382 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2125947069, now seen corresponding path program 226 times [2022-01-18 15:27:27,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616428384] [2022-01-18 15:27:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:27,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:27,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616428384] [2022-01-18 15:27:27,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616428384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064212017] [2022-01-18 15:27:27,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:27:27,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:27,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:27,563 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) [2022-01-18 15:27:27,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:27:27,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:27:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:27,860 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 153 treesize of output 137 [2022-01-18 15:27:28,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:28,442 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 189 [2022-01-18 15:27:28,444 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 163 treesize of output 147 [2022-01-18 15:27:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:28,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:28,958 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 312 treesize of output 276 [2022-01-18 15:27:29,352 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:29,352 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 162 treesize of output 143 [2022-01-18 15:27:29,357 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 [2022-01-18 15:27:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:29,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064212017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:29,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:29,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:29,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69531291] [2022-01-18 15:27:29,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:29,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:29,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:29,517 INFO L87 Difference]: Start difference. First operand 830 states and 2824 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) [2022-01-18 15:27:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:30,664 INFO L93 Difference]: Finished difference Result 1664 states and 5275 transitions. [2022-01-18 15:27:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:27:30,664 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 [2022-01-18 15:27:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:30,666 INFO L225 Difference]: With dead ends: 1664 [2022-01-18 15:27:30,666 INFO L226 Difference]: Without dead ends: 1504 [2022-01-18 15:27:30,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=2107, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:27:30,667 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 195 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:30,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 729 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1165 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2022-01-18 15:27:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-01-18 15:27:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 882. [2022-01-18 15:27:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.383654937570942) internal successors, (2981), 881 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2981 transitions. [2022-01-18 15:27:30,679 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2981 transitions. Word has length 23 [2022-01-18 15:27:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:30,679 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2981 transitions. [2022-01-18 15:27:30,679 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) [2022-01-18 15:27:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2981 transitions. [2022-01-18 15:27:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:30,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:30,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:30,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:30,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:30,896 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1620002555, now seen corresponding path program 227 times [2022-01-18 15:27:30,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:30,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702299991] [2022-01-18 15:27:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:30,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:31,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702299991] [2022-01-18 15:27:31,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702299991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745096368] [2022-01-18 15:27:31,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:27:31,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:31,088 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) [2022-01-18 15:27:31,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:27:31,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:27:31,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:27:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:31,432 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 228 treesize of output 208 [2022-01-18 15:27:32,054 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 165 treesize of output 141 [2022-01-18 15:27:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:32,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:32,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:32,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:32,933 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:32,933 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 210 treesize of output 187 [2022-01-18 15:27:32,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:27:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:33,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745096368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:33,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:33,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:33,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976197875] [2022-01-18 15:27:33,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:33,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:33,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:33,046 INFO L87 Difference]: Start difference. First operand 882 states and 2981 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) [2022-01-18 15:27:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:33,988 INFO L93 Difference]: Finished difference Result 1787 states and 6041 transitions. [2022-01-18 15:27:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:27:33,988 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 [2022-01-18 15:27:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:33,991 INFO L225 Difference]: With dead ends: 1787 [2022-01-18 15:27:33,991 INFO L226 Difference]: Without dead ends: 1704 [2022-01-18 15:27:33,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=2545, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:27:33,991 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:33,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 619 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 938 Invalid, 0 Unknown, 450 Unchecked, 0.3s Time] [2022-01-18 15:27:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-01-18 15:27:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 894. [2022-01-18 15:27:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.3807390817469205) internal successors, (3019), 893 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3019 transitions. [2022-01-18 15:27:34,017 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3019 transitions. Word has length 23 [2022-01-18 15:27:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:34,017 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 3019 transitions. [2022-01-18 15:27:34,017 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) [2022-01-18 15:27:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3019 transitions. [2022-01-18 15:27:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:34,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:34,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:34,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:34,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:34,233 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -408546467, now seen corresponding path program 228 times [2022-01-18 15:27:34,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995233049] [2022-01-18 15:27:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:34,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:34,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995233049] [2022-01-18 15:27:34,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995233049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073604804] [2022-01-18 15:27:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:27:34,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:34,358 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) [2022-01-18 15:27:34,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:27:34,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:27:34,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:34,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:34,644 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 136 treesize of output 120 [2022-01-18 15:27:35,021 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 145 treesize of output 125 [2022-01-18 15:27:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:35,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:35,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:35,396 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 188 treesize of output 164 [2022-01-18 15:27:35,766 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:35,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:27:35,771 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 [2022-01-18 15:27:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:35,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073604804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:35,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:35,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:27:35,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185607233] [2022-01-18 15:27:35,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:35,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:27:35,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:27:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:27:35,895 INFO L87 Difference]: Start difference. First operand 894 states and 3019 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) [2022-01-18 15:27:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:36,443 INFO L93 Difference]: Finished difference Result 1652 states and 5419 transitions. [2022-01-18 15:27:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:27:36,443 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 [2022-01-18 15:27:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:36,445 INFO L225 Difference]: With dead ends: 1652 [2022-01-18 15:27:36,445 INFO L226 Difference]: Without dead ends: 1593 [2022-01-18 15:27:36,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:27:36,445 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:36,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 613 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 818 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-01-18 15:27:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-01-18 15:27:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 939. [2022-01-18 15:27:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.3560767590618337) internal successors, (3148), 938 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3148 transitions. [2022-01-18 15:27:36,457 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3148 transitions. Word has length 23 [2022-01-18 15:27:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:36,457 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 3148 transitions. [2022-01-18 15:27:36,458 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) [2022-01-18 15:27:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3148 transitions. [2022-01-18 15:27:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:36,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:36,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:36,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:36,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:36,675 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -55406977, now seen corresponding path program 229 times [2022-01-18 15:27:36,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:36,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525477695] [2022-01-18 15:27:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:27:36,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:36,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525477695] [2022-01-18 15:27:36,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525477695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:36,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195323174] [2022-01-18 15:27:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:27:36,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:36,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:36,807 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) [2022-01-18 15:27:36,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:27:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:37,113 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 183 treesize of output 159 [2022-01-18 15:27:37,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:37,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:37,560 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 218 treesize of output 192 [2022-01-18 15:27:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:37,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 220 [2022-01-18 15:27:38,430 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 377 treesize of output 321 [2022-01-18 15:27:38,439 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:38,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 289 [2022-01-18 15:27:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:38,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195323174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:38,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:38,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:38,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431657831] [2022-01-18 15:27:38,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:38,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:38,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:38,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:38,641 INFO L87 Difference]: Start difference. First operand 939 states and 3148 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) [2022-01-18 15:27:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:39,765 INFO L93 Difference]: Finished difference Result 1414 states and 4449 transitions. [2022-01-18 15:27:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:27:39,765 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 [2022-01-18 15:27:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:39,767 INFO L225 Difference]: With dead ends: 1414 [2022-01-18 15:27:39,767 INFO L226 Difference]: Without dead ends: 1285 [2022-01-18 15:27:39,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:27:39,767 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 184 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:39,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 659 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1132 Invalid, 0 Unknown, 237 Unchecked, 0.4s Time] [2022-01-18 15:27:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-01-18 15:27:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 935. [2022-01-18 15:27:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.356531049250535) internal successors, (3135), 934 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3135 transitions. [2022-01-18 15:27:39,778 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3135 transitions. Word has length 23 [2022-01-18 15:27:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:39,778 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 3135 transitions. [2022-01-18 15:27:39,778 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) [2022-01-18 15:27:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3135 transitions. [2022-01-18 15:27:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:39,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:39,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:39,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:39,996 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,SelfDestructingSolverStorable245 [2022-01-18 15:27:39,996 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash 894269395, now seen corresponding path program 230 times [2022-01-18 15:27:39,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:39,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327763862] [2022-01-18 15:27:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:39,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:40,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327763862] [2022-01-18 15:27:40,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327763862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39429999] [2022-01-18 15:27:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:27:40,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:40,131 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) [2022-01-18 15:27:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:27:40,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:27:40,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:40,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:40,453 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 239 treesize of output 213 [2022-01-18 15:27:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:40,895 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 232 [2022-01-18 15:27:40,898 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 206 treesize of output 180 [2022-01-18 15:27:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:41,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:41,305 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 218 treesize of output 198 [2022-01-18 15:27:41,528 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:41,528 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 162 treesize of output 143 [2022-01-18 15:27:41,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:27:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:41,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39429999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:41,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:41,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:27:41,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627524083] [2022-01-18 15:27:41,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:41,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:27:41,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:27:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:27:41,622 INFO L87 Difference]: Start difference. First operand 935 states and 3135 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) [2022-01-18 15:27:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:41,862 INFO L93 Difference]: Finished difference Result 1349 states and 4328 transitions. [2022-01-18 15:27:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:27:41,863 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 [2022-01-18 15:27:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:41,864 INFO L225 Difference]: With dead ends: 1349 [2022-01-18 15:27:41,864 INFO L226 Difference]: Without dead ends: 1260 [2022-01-18 15:27:41,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:27:41,865 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:41,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 255 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 562 Invalid, 0 Unknown, 336 Unchecked, 0.2s Time] [2022-01-18 15:27:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-18 15:27:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 953. [2022-01-18 15:27:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.351890756302521) internal successors, (3191), 952 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3191 transitions. [2022-01-18 15:27:41,875 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3191 transitions. Word has length 23 [2022-01-18 15:27:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:41,876 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3191 transitions. [2022-01-18 15:27:41,876 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) [2022-01-18 15:27:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3191 transitions. [2022-01-18 15:27:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:41,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:41,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:41,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:42,093 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,SelfDestructingSolverStorable246 [2022-01-18 15:27:42,094 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1393962373, now seen corresponding path program 231 times [2022-01-18 15:27:42,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:42,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486040066] [2022-01-18 15:27:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:42,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:42,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:42,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486040066] [2022-01-18 15:27:42,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486040066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:42,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657489567] [2022-01-18 15:27:42,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:27:42,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:42,197 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) [2022-01-18 15:27:42,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:27:42,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:27:42,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:42,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 196 [2022-01-18 15:27:43,029 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 128 treesize of output 112 [2022-01-18 15:27:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:43,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:43,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:43,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:43,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:43,854 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:43,854 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 250 treesize of output 211 [2022-01-18 15:27:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:44,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657489567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:44,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:44,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:27:44,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111889855] [2022-01-18 15:27:44,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:44,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:27:44,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:27:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:27:44,042 INFO L87 Difference]: Start difference. First operand 953 states and 3191 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) [2022-01-18 15:27:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:44,248 INFO L93 Difference]: Finished difference Result 1276 states and 4128 transitions. [2022-01-18 15:27:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:27:44,248 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 [2022-01-18 15:27:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:44,250 INFO L225 Difference]: With dead ends: 1276 [2022-01-18 15:27:44,250 INFO L226 Difference]: Without dead ends: 1215 [2022-01-18 15:27:44,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:27:44,250 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:44,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 308 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 526 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2022-01-18 15:27:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-01-18 15:27:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1027. [2022-01-18 15:27:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.320662768031189) internal successors, (3407), 1026 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3407 transitions. [2022-01-18 15:27:44,261 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3407 transitions. Word has length 23 [2022-01-18 15:27:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:44,261 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 3407 transitions. [2022-01-18 15:27:44,261 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) [2022-01-18 15:27:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3407 transitions. [2022-01-18 15:27:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:44,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:44,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:44,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 15:27:44,479 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,SelfDestructingSolverStorable247 [2022-01-18 15:27:44,479 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:44,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1089657063, now seen corresponding path program 232 times [2022-01-18 15:27:44,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:44,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865752229] [2022-01-18 15:27:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:44,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:27:44,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865752229] [2022-01-18 15:27:44,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865752229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109697546] [2022-01-18 15:27:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:27:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:44,635 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) [2022-01-18 15:27:44,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:27:44,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:27:44,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:44,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:45,014 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 276 treesize of output 250 [2022-01-18 15:27:45,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:45,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:45,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:45,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:45,790 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 159 treesize of output 139 [2022-01-18 15:27:46,328 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:46,329 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 239 treesize of output 212 [2022-01-18 15:27:46,333 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 194 treesize of output 174 [2022-01-18 15:27:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109697546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:46,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:46,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 15:27:46,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128351263] [2022-01-18 15:27:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:46,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:27:46,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:27:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:27:46,444 INFO L87 Difference]: Start difference. First operand 1027 states and 3407 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) [2022-01-18 15:27:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:47,105 INFO L93 Difference]: Finished difference Result 1805 states and 5755 transitions. [2022-01-18 15:27:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:27:47,105 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 [2022-01-18 15:27:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:47,108 INFO L225 Difference]: With dead ends: 1805 [2022-01-18 15:27:47,108 INFO L226 Difference]: Without dead ends: 1715 [2022-01-18 15:27:47,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:27:47,108 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:47,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 429 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 798 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-01-18 15:27:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-01-18 15:27:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1053. [2022-01-18 15:27:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.30893536121673) internal successors, (3481), 1052 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3481 transitions. [2022-01-18 15:27:47,121 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3481 transitions. Word has length 23 [2022-01-18 15:27:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:47,121 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3481 transitions. [2022-01-18 15:27:47,121 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) [2022-01-18 15:27:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3481 transitions. [2022-01-18 15:27:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:47,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:47,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:47,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:47,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:47,339 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2146574085, now seen corresponding path program 233 times [2022-01-18 15:27:47,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116386649] [2022-01-18 15:27:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:47,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:47,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:47,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116386649] [2022-01-18 15:27:47,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116386649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:47,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373857288] [2022-01-18 15:27:47,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:27:47,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:47,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:47,437 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) [2022-01-18 15:27:47,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:27:47,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:27:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:27:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:47,763 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 187 treesize of output 169 [2022-01-18 15:27:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:48,315 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 161 [2022-01-18 15:27:48,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:48,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:48,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:49,233 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 329 treesize of output 285 [2022-01-18 15:27:49,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:49,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 254 [2022-01-18 15:27:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:49,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373857288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:49,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:49,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:27:49,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029312415] [2022-01-18 15:27:49,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:49,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:27:49,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:27:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:27:49,440 INFO L87 Difference]: Start difference. First operand 1053 states and 3481 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) [2022-01-18 15:27:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:50,189 INFO L93 Difference]: Finished difference Result 1689 states and 5372 transitions. [2022-01-18 15:27:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:27:50,190 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 23 [2022-01-18 15:27:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:50,192 INFO L225 Difference]: With dead ends: 1689 [2022-01-18 15:27:50,192 INFO L226 Difference]: Without dead ends: 1625 [2022-01-18 15:27:50,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:27:50,192 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 912 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1074 Invalid, 0 Unknown, 402 Unchecked, 0.3s Time] [2022-01-18 15:27:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-01-18 15:27:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1119. [2022-01-18 15:27:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.2871198568872986) internal successors, (3675), 1118 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3675 transitions. [2022-01-18 15:27:50,206 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3675 transitions. Word has length 23 [2022-01-18 15:27:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:50,206 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3675 transitions. [2022-01-18 15:27:50,206 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) [2022-01-18 15:27:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3675 transitions. [2022-01-18 15:27:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:50,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:50,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:50,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-18 15:27:50,427 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:50,427 INFO L85 PathProgramCache]: Analyzing trace with hash 323438229, now seen corresponding path program 234 times [2022-01-18 15:27:50,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68194639] [2022-01-18 15:27:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:50,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:50,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68194639] [2022-01-18 15:27:50,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68194639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:50,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289383426] [2022-01-18 15:27:50,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:27:50,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:50,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:50,519 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) [2022-01-18 15:27:50,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:27:50,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:27:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:50,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:50,815 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 136 treesize of output 120 [2022-01-18 15:27:51,165 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 165 treesize of output 141 [2022-01-18 15:27:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:51,168 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 15:27:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:51,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:51,533 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 206 treesize of output 186 [2022-01-18 15:27:51,871 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:51,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-01-18 15:27:51,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-01-18 15:27:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:51,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289383426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:51,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:27:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007070439] [2022-01-18 15:27:51,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:51,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:27:51,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:27:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:27:51,958 INFO L87 Difference]: Start difference. First operand 1119 states and 3675 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) [2022-01-18 15:27:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:52,357 INFO L93 Difference]: Finished difference Result 1900 states and 6212 transitions. [2022-01-18 15:27:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:27:52,357 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 [2022-01-18 15:27:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:52,360 INFO L225 Difference]: With dead ends: 1900 [2022-01-18 15:27:52,360 INFO L226 Difference]: Without dead ends: 1802 [2022-01-18 15:27:52,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:27:52,360 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 90 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:52,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 462 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 609 Invalid, 0 Unknown, 227 Unchecked, 0.1s Time] [2022-01-18 15:27:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-01-18 15:27:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1147. [2022-01-18 15:27:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.283595113438045) internal successors, (3763), 1146 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3763 transitions. [2022-01-18 15:27:52,374 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3763 transitions. Word has length 23 [2022-01-18 15:27:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:52,374 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 3763 transitions. [2022-01-18 15:27:52,374 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) [2022-01-18 15:27:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3763 transitions. [2022-01-18 15:27:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:52,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:52,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:52,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:52,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:52,592 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:52,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash 676577719, now seen corresponding path program 235 times [2022-01-18 15:27:52,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:52,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231636722] [2022-01-18 15:27:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:52,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:27:52,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231636722] [2022-01-18 15:27:52,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231636722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003268990] [2022-01-18 15:27:52,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:27:52,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:52,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:52,745 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) [2022-01-18 15:27:52,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:27:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:53,127 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 294 treesize of output 250 [2022-01-18 15:27:53,572 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 128 treesize of output 112 [2022-01-18 15:27:53,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:53,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:27:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:53,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:53,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:54,287 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 197 treesize of output 173 [2022-01-18 15:27:54,294 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:54,295 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 180 treesize of output 161 [2022-01-18 15:27:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:54,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003268990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:54,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:54,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:27:54,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769728618] [2022-01-18 15:27:54,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:54,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:27:54,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:27:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:27:54,432 INFO L87 Difference]: Start difference. First operand 1147 states and 3763 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) [2022-01-18 15:27:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:55,509 INFO L93 Difference]: Finished difference Result 1791 states and 5683 transitions. [2022-01-18 15:27:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:27:55,510 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 [2022-01-18 15:27:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:55,512 INFO L225 Difference]: With dead ends: 1791 [2022-01-18 15:27:55,512 INFO L226 Difference]: Without dead ends: 1684 [2022-01-18 15:27:55,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:27:55,512 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 132 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:55,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 680 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1069 Invalid, 0 Unknown, 366 Unchecked, 0.4s Time] [2022-01-18 15:27:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2022-01-18 15:27:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1157. [2022-01-18 15:27:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.2811418685121105) internal successors, (3793), 1156 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3793 transitions. [2022-01-18 15:27:55,525 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3793 transitions. Word has length 23 [2022-01-18 15:27:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:55,526 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 3793 transitions. [2022-01-18 15:27:55,526 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) [2022-01-18 15:27:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3793 transitions. [2022-01-18 15:27:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:55,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:55,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:55,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-18 15:27:55,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:55,743 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1678921, now seen corresponding path program 236 times [2022-01-18 15:27:55,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:55,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536300400] [2022-01-18 15:27:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:55,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:55,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:55,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536300400] [2022-01-18 15:27:55,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536300400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:55,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647719364] [2022-01-18 15:27:55,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:27:55,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:55,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:55,829 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) [2022-01-18 15:27:55,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:27:56,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:27:56,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:56,192 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 173 treesize of output 155 [2022-01-18 15:27:56,830 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 148 treesize of output 128 [2022-01-18 15:27:56,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:56,833 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 160 treesize of output 140 [2022-01-18 15:27:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:57,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:57,150 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 142 treesize of output 126 [2022-01-18 15:27:57,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 317 [2022-01-18 15:27:57,603 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:57,604 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 285 [2022-01-18 15:27:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:57,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647719364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:57,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:57,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:27:57,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177511193] [2022-01-18 15:27:57,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:57,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:27:57,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:27:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:27:57,750 INFO L87 Difference]: Start difference. First operand 1157 states and 3793 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) [2022-01-18 15:27:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:27:57,878 INFO L93 Difference]: Finished difference Result 1345 states and 4324 transitions. [2022-01-18 15:27:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:27:57,878 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 [2022-01-18 15:27:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:27:57,880 INFO L225 Difference]: With dead ends: 1345 [2022-01-18 15:27:57,880 INFO L226 Difference]: Without dead ends: 1323 [2022-01-18 15:27:57,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:27:57,880 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:27:57,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 190 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-18 15:27:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-01-18 15:27:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1152. [2022-01-18 15:27:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.281494352736751) internal successors, (3777), 1151 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:27:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3777 transitions. [2022-01-18 15:27:57,892 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3777 transitions. Word has length 23 [2022-01-18 15:27:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:27:57,892 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 3777 transitions. [2022-01-18 15:27:57,892 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) [2022-01-18 15:27:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3777 transitions. [2022-01-18 15:27:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:27:57,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:27:57,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:27:57,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-18 15:27:58,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:58,094 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:27:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:27:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2024087217, now seen corresponding path program 237 times [2022-01-18 15:27:58,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:27:58,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346020032] [2022-01-18 15:27:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:27:58,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:27:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:27:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:27:58,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:27:58,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346020032] [2022-01-18 15:27:58,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346020032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:27:58,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907564223] [2022-01-18 15:27:58,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:27:58,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:27:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:27:58,208 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) [2022-01-18 15:27:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:27:58,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:27:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:27:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:27:58,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:27:58,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:27:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:27:59,089 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-01-18 15:27:59,092 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 122 [2022-01-18 15:27:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:59,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:27:59,469 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 247 treesize of output 213 [2022-01-18 15:27:59,839 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 312 treesize of output 272 [2022-01-18 15:27:59,846 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:27:59,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:27:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:27:59,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907564223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:27:59,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:27:59,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 15:27:59,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582539249] [2022-01-18 15:27:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:27:59,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:27:59,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:27:59,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:27:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:27:59,994 INFO L87 Difference]: Start difference. First operand 1152 states and 3777 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) [2022-01-18 15:28:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:00,801 INFO L93 Difference]: Finished difference Result 1940 states and 6070 transitions. [2022-01-18 15:28:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:28:00,801 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 [2022-01-18 15:28:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:00,805 INFO L225 Difference]: With dead ends: 1940 [2022-01-18 15:28:00,805 INFO L226 Difference]: Without dead ends: 1872 [2022-01-18 15:28:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=2187, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:28:00,805 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:00,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 867 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1288 Invalid, 0 Unknown, 238 Unchecked, 0.4s Time] [2022-01-18 15:28:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-01-18 15:28:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1197. [2022-01-18 15:28:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.270903010033445) internal successors, (3912), 1196 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3912 transitions. [2022-01-18 15:28:00,824 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3912 transitions. Word has length 23 [2022-01-18 15:28:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:00,824 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3912 transitions. [2022-01-18 15:28:00,824 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) [2022-01-18 15:28:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3912 transitions. [2022-01-18 15:28:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:00,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:00,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:00,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:01,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:01,046 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1973857221, now seen corresponding path program 238 times [2022-01-18 15:28:01,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370788953] [2022-01-18 15:28:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:01,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:01,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:01,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370788953] [2022-01-18 15:28:01,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370788953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:01,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031195053] [2022-01-18 15:28:01,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:28:01,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:01,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:01,167 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) [2022-01-18 15:28:01,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:28:01,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:28:01,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:01,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 269 [2022-01-18 15:28:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:02,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:28:02,101 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 173 treesize of output 157 [2022-01-18 15:28:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:02,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:02,542 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 291 treesize of output 259 [2022-01-18 15:28:02,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 175 [2022-01-18 15:28:02,923 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:02,923 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 182 treesize of output 163 [2022-01-18 15:28:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:03,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031195053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:03,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:03,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:28:03,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349420262] [2022-01-18 15:28:03,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:03,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:28:03,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:28:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:28:03,081 INFO L87 Difference]: Start difference. First operand 1197 states and 3912 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) [2022-01-18 15:28:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:04,113 INFO L93 Difference]: Finished difference Result 1968 states and 6271 transitions. [2022-01-18 15:28:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:28:04,114 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 [2022-01-18 15:28:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:04,116 INFO L225 Difference]: With dead ends: 1968 [2022-01-18 15:28:04,116 INFO L226 Difference]: Without dead ends: 1851 [2022-01-18 15:28:04,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:28:04,117 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 155 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:04,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 635 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1212 Invalid, 0 Unknown, 260 Unchecked, 0.4s Time] [2022-01-18 15:28:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-01-18 15:28:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1251. [2022-01-18 15:28:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.2688) internal successors, (4086), 1250 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4086 transitions. [2022-01-18 15:28:04,131 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4086 transitions. Word has length 23 [2022-01-18 15:28:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:04,131 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 4086 transitions. [2022-01-18 15:28:04,131 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) [2022-01-18 15:28:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4086 transitions. [2022-01-18 15:28:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:04,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:04,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:04,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:04,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:04,353 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash 857246503, now seen corresponding path program 239 times [2022-01-18 15:28:04,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:04,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390225906] [2022-01-18 15:28:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:04,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:04,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390225906] [2022-01-18 15:28:04,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390225906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341440159] [2022-01-18 15:28:04,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:28:04,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:04,418 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) [2022-01-18 15:28:04,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 15:28:04,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:28:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:28:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:04,673 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 153 treesize of output 137 [2022-01-18 15:28:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:05,252 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 233 [2022-01-18 15:28:05,255 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 224 treesize of output 194 [2022-01-18 15:28:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:05,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:05,783 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 275 treesize of output 231 [2022-01-18 15:28:06,152 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:06,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:28:06,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:28:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:06,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341440159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:06,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:06,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:28:06,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179370907] [2022-01-18 15:28:06,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:28:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:28:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:28:06,364 INFO L87 Difference]: Start difference. First operand 1251 states and 4086 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-01-18 15:28:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:06,778 INFO L93 Difference]: Finished difference Result 1796 states and 5655 transitions. [2022-01-18 15:28:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:28:06,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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 [2022-01-18 15:28:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:06,782 INFO L225 Difference]: With dead ends: 1796 [2022-01-18 15:28:06,782 INFO L226 Difference]: Without dead ends: 1758 [2022-01-18 15:28:06,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:28:06,782 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:06,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 392 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 595 Invalid, 0 Unknown, 411 Unchecked, 0.2s Time] [2022-01-18 15:28:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-01-18 15:28:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1318. [2022-01-18 15:28:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.2672741078208047) internal successors, (4303), 1317 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4303 transitions. [2022-01-18 15:28:06,801 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4303 transitions. Word has length 23 [2022-01-18 15:28:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:06,801 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 4303 transitions. [2022-01-18 15:28:06,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-01-18 15:28:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4303 transitions. [2022-01-18 15:28:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:06,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:06,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:06,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 15:28:07,021 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,SelfDestructingSolverStorable255 [2022-01-18 15:28:07,021 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash 188566481, now seen corresponding path program 240 times [2022-01-18 15:28:07,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:07,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769820749] [2022-01-18 15:28:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:07,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:07,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:07,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769820749] [2022-01-18 15:28:07,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769820749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:07,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099688745] [2022-01-18 15:28:07,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:28:07,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:07,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:07,090 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) [2022-01-18 15:28:07,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 15:28:07,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:28:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:07,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:07,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:07,791 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 227 treesize of output 197 [2022-01-18 15:28:07,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:07,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:08,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:08,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:08,433 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:08,434 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 214 treesize of output 191 [2022-01-18 15:28:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:08,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099688745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:08,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:08,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:28:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045973906] [2022-01-18 15:28:08,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:28:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:28:08,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:28:08,584 INFO L87 Difference]: Start difference. First operand 1318 states and 4303 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) [2022-01-18 15:28:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:08,761 INFO L93 Difference]: Finished difference Result 1717 states and 5510 transitions. [2022-01-18 15:28:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:28:08,762 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 [2022-01-18 15:28:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:08,765 INFO L225 Difference]: With dead ends: 1717 [2022-01-18 15:28:08,765 INFO L226 Difference]: Without dead ends: 1661 [2022-01-18 15:28:08,765 INFO L932 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 [2022-01-18 15:28:08,765 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:08,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 247 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 356 Invalid, 0 Unknown, 238 Unchecked, 0.1s Time] [2022-01-18 15:28:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-18 15:28:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1378. [2022-01-18 15:28:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.262890341321714) internal successors, (4493), 1377 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4493 transitions. [2022-01-18 15:28:08,780 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4493 transitions. Word has length 23 [2022-01-18 15:28:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:08,781 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 4493 transitions. [2022-01-18 15:28:08,781 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) [2022-01-18 15:28:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4493 transitions. [2022-01-18 15:28:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:08,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:08,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:08,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:08,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 15:28:08,995 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash 417063447, now seen corresponding path program 241 times [2022-01-18 15:28:08,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184310919] [2022-01-18 15:28:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:08,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:09,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184310919] [2022-01-18 15:28:09,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184310919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034852818] [2022-01-18 15:28:09,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:28:09,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:09,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:09,054 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) [2022-01-18 15:28:09,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 15:28:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:09,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:09,308 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 187 treesize of output 163 [2022-01-18 15:28:09,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:09,677 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 192 treesize of output 166 [2022-01-18 15:28:09,700 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 140 treesize of output 126 [2022-01-18 15:28:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:09,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:09,911 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 171 treesize of output 151 [2022-01-18 15:28:10,133 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:10,133 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 191 treesize of output 168 [2022-01-18 15:28:10,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:28:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:10,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034852818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:10,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:10,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:28:10,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685184960] [2022-01-18 15:28:10,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:10,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:28:10,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:28:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:28:10,224 INFO L87 Difference]: Start difference. First operand 1378 states and 4493 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) [2022-01-18 15:28:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:10,342 INFO L93 Difference]: Finished difference Result 1764 states and 5612 transitions. [2022-01-18 15:28:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:28:10,342 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 [2022-01-18 15:28:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:10,345 INFO L225 Difference]: With dead ends: 1764 [2022-01-18 15:28:10,345 INFO L226 Difference]: Without dead ends: 1742 [2022-01-18 15:28:10,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:28:10,345 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:10,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 206 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 344 Unchecked, 0.1s Time] [2022-01-18 15:28:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-01-18 15:28:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1392. [2022-01-18 15:28:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2566498921639107) internal successors, (4530), 1391 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4530 transitions. [2022-01-18 15:28:10,362 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4530 transitions. Word has length 23 [2022-01-18 15:28:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:10,362 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4530 transitions. [2022-01-18 15:28:10,362 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) [2022-01-18 15:28:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4530 transitions. [2022-01-18 15:28:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:10,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:10,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:10,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 15:28:10,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 15:28:10,577 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1554430441, now seen corresponding path program 242 times [2022-01-18 15:28:10,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:10,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280951529] [2022-01-18 15:28:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:10,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:10,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280951529] [2022-01-18 15:28:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280951529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907533372] [2022-01-18 15:28:10,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:28:10,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:10,734 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) [2022-01-18 15:28:10,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 15:28:10,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:28:10,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:10,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:11,060 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 187 treesize of output 163 [2022-01-18 15:28:11,681 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 148 treesize of output 128 [2022-01-18 15:28:11,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:11,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:28:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:11,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:12,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:12,332 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:12,333 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 191 treesize of output 168 [2022-01-18 15:28:12,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:28:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907533372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:12,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:12,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:28:12,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259550075] [2022-01-18 15:28:12,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:12,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:28:12,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:28:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:28:12,448 INFO L87 Difference]: Start difference. First operand 1392 states and 4530 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) [2022-01-18 15:28:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:13,240 INFO L93 Difference]: Finished difference Result 1968 states and 6251 transitions. [2022-01-18 15:28:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:28:13,240 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 [2022-01-18 15:28:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:13,243 INFO L225 Difference]: With dead ends: 1968 [2022-01-18 15:28:13,243 INFO L226 Difference]: Without dead ends: 1939 [2022-01-18 15:28:13,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:28:13,243 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 129 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:13,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 556 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 741 Invalid, 0 Unknown, 522 Unchecked, 0.2s Time] [2022-01-18 15:28:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-01-18 15:28:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1423. [2022-01-18 15:28:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.2587904360056257) internal successors, (4634), 1422 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4634 transitions. [2022-01-18 15:28:13,259 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4634 transitions. Word has length 23 [2022-01-18 15:28:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:13,259 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4634 transitions. [2022-01-18 15:28:13,259 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) [2022-01-18 15:28:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4634 transitions. [2022-01-18 15:28:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:13,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:13,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:13,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 15:28:13,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:13,478 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:13,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash 693758389, now seen corresponding path program 243 times [2022-01-18 15:28:13,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:13,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649080038] [2022-01-18 15:28:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:13,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:13,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649080038] [2022-01-18 15:28:13,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649080038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602142423] [2022-01-18 15:28:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:28:13,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:13,637 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) [2022-01-18 15:28:13,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 15:28:13,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:28:13,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:28:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:13,942 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 153 treesize of output 137 [2022-01-18 15:28:14,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:14,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 364 treesize of output 300 [2022-01-18 15:28:14,593 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 291 treesize of output 259 [2022-01-18 15:28:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:14,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:15,120 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 275 treesize of output 239 [2022-01-18 15:28:15,540 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 247 treesize of output 219 [2022-01-18 15:28:15,546 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:15,546 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 226 treesize of output 203 [2022-01-18 15:28:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:15,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602142423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:15,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:15,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:28:15,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537347572] [2022-01-18 15:28:15,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:15,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:28:15,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:28:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:28:15,658 INFO L87 Difference]: Start difference. First operand 1423 states and 4634 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) [2022-01-18 15:28:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:19,824 INFO L93 Difference]: Finished difference Result 2989 states and 9011 transitions. [2022-01-18 15:28:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 15:28:19,824 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 [2022-01-18 15:28:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:19,828 INFO L225 Difference]: With dead ends: 2989 [2022-01-18 15:28:19,828 INFO L226 Difference]: Without dead ends: 2770 [2022-01-18 15:28:19,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1255, Invalid=9457, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 15:28:19,829 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 387 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:19,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1011 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1469 Invalid, 0 Unknown, 1095 Unchecked, 0.6s Time] [2022-01-18 15:28:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2022-01-18 15:28:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1613. [2022-01-18 15:28:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 3.2574441687344913) internal successors, (5251), 1612 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 5251 transitions. [2022-01-18 15:28:19,852 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 5251 transitions. Word has length 23 [2022-01-18 15:28:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:19,852 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 5251 transitions. [2022-01-18 15:28:19,852 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) [2022-01-18 15:28:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 5251 transitions. [2022-01-18 15:28:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:19,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:19,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:19,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:20,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-18 15:28:20,068 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -560191471, now seen corresponding path program 244 times [2022-01-18 15:28:20,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:20,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916436628] [2022-01-18 15:28:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:20,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:20,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:20,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916436628] [2022-01-18 15:28:20,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916436628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:20,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597842448] [2022-01-18 15:28:20,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:28:20,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:20,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:20,190 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) [2022-01-18 15:28:20,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 15:28:20,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:28:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:20,604 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 285 treesize of output 243 [2022-01-18 15:28:21,267 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 252 treesize of output 218 [2022-01-18 15:28:21,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:21,269 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 212 [2022-01-18 15:28:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:21,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:21,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 198 [2022-01-18 15:28:21,840 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:21,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:28:21,844 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 [2022-01-18 15:28:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:21,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597842448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:21,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:21,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:28:21,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747435287] [2022-01-18 15:28:21,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:21,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:28:21,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:28:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:28:21,930 INFO L87 Difference]: Start difference. First operand 1613 states and 5251 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) [2022-01-18 15:28:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:22,572 INFO L93 Difference]: Finished difference Result 2320 states and 7324 transitions. [2022-01-18 15:28:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:28:22,572 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 [2022-01-18 15:28:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:22,575 INFO L225 Difference]: With dead ends: 2320 [2022-01-18 15:28:22,575 INFO L226 Difference]: Without dead ends: 2270 [2022-01-18 15:28:22,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:28:22,575 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:22,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 686 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1054 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-01-18 15:28:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-01-18 15:28:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1619. [2022-01-18 15:28:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.2527812113720644) internal successors, (5263), 1618 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5263 transitions. [2022-01-18 15:28:22,595 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5263 transitions. Word has length 23 [2022-01-18 15:28:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:22,595 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 5263 transitions. [2022-01-18 15:28:22,595 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) [2022-01-18 15:28:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5263 transitions. [2022-01-18 15:28:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:22,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:22,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:22,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:22,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-01-18 15:28:22,807 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:22,807 INFO L85 PathProgramCache]: Analyzing trace with hash 735285179, now seen corresponding path program 245 times [2022-01-18 15:28:22,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:22,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353106719] [2022-01-18 15:28:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:22,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:22,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353106719] [2022-01-18 15:28:22,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353106719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49383289] [2022-01-18 15:28:22,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:28:22,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:22,934 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) [2022-01-18 15:28:22,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 15:28:23,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:28:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:28:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:24,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 76 treesize of output 64 [2022-01-18 15:28:24,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 222 [2022-01-18 15:28:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:24,371 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 194 [2022-01-18 15:28:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:24,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:25,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:28:25,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 76 [2022-01-18 15:28:25,863 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:25,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:28:25,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:28:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49383289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:26,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 28 [2022-01-18 15:28:26,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608110661] [2022-01-18 15:28:26,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:26,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:28:26,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:28:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:28:26,009 INFO L87 Difference]: Start difference. First operand 1619 states and 5263 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 15:28:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:28,146 INFO L93 Difference]: Finished difference Result 2547 states and 8093 transitions. [2022-01-18 15:28:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:28:28,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 [2022-01-18 15:28:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:28,150 INFO L225 Difference]: With dead ends: 2547 [2022-01-18 15:28:28,150 INFO L226 Difference]: Without dead ends: 2523 [2022-01-18 15:28:28,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=495, Invalid=4061, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:28:28,151 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 152 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:28,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 797 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1533 Invalid, 0 Unknown, 367 Unchecked, 0.6s Time] [2022-01-18 15:28:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2022-01-18 15:28:28,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1629. [2022-01-18 15:28:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.2598280098280097) internal successors, (5307), 1628 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5307 transitions. [2022-01-18 15:28:28,172 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5307 transitions. Word has length 23 [2022-01-18 15:28:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:28,173 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5307 transitions. [2022-01-18 15:28:28,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 15:28:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5307 transitions. [2022-01-18 15:28:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:28,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:28,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:28,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:28,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:28,378 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash 478511741, now seen corresponding path program 246 times [2022-01-18 15:28:28,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:28,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767573098] [2022-01-18 15:28:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:28,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:28,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767573098] [2022-01-18 15:28:28,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767573098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466492034] [2022-01-18 15:28:28,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:28:28,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:28,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:28,497 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) [2022-01-18 15:28:28,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 15:28:28,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:28:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:28:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:29,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:29,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 297 treesize of output 257 [2022-01-18 15:28:30,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:30,221 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 72 [2022-01-18 15:28:30,223 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 76 treesize of output 66 [2022-01-18 15:28:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:30,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:30,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:28:30,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 373 treesize of output 343 [2022-01-18 15:28:31,172 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:31,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 173 [2022-01-18 15:28:31,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 152 [2022-01-18 15:28:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:31,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466492034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:31,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:31,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 34 [2022-01-18 15:28:31,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459037774] [2022-01-18 15:28:31,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:31,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:28:31,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:28:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:28:31,322 INFO L87 Difference]: Start difference. First operand 1629 states and 5307 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 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) [2022-01-18 15:28:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:31,849 INFO L93 Difference]: Finished difference Result 1863 states and 6010 transitions. [2022-01-18 15:28:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:28:31,850 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 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 [2022-01-18 15:28:31,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:31,852 INFO L225 Difference]: With dead ends: 1863 [2022-01-18 15:28:31,852 INFO L226 Difference]: Without dead ends: 1840 [2022-01-18 15:28:31,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:28:31,853 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:31,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 436 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 500 Invalid, 0 Unknown, 640 Unchecked, 0.2s Time] [2022-01-18 15:28:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-01-18 15:28:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1632. [2022-01-18 15:28:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.258736971183323) internal successors, (5315), 1631 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5315 transitions. [2022-01-18 15:28:31,870 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5315 transitions. Word has length 23 [2022-01-18 15:28:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:31,870 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5315 transitions. [2022-01-18 15:28:31,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 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) [2022-01-18 15:28:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5315 transitions. [2022-01-18 15:28:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:31,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:31,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:31,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:32,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:32,089 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:32,089 INFO L85 PathProgramCache]: Analyzing trace with hash -232090229, now seen corresponding path program 247 times [2022-01-18 15:28:32,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:32,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202596735] [2022-01-18 15:28:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:32,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:32,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:32,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202596735] [2022-01-18 15:28:32,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202596735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:32,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648712914] [2022-01-18 15:28:32,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:28:32,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:32,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:32,298 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) [2022-01-18 15:28:32,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 15:28:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:28:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:32,707 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 183 treesize of output 159 [2022-01-18 15:28:33,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:33,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:28:33,219 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 151 treesize of output 133 [2022-01-18 15:28:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:33,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:33,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:34,259 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 243 [2022-01-18 15:28:34,267 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:34,268 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 250 treesize of output 211 [2022-01-18 15:28:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:34,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648712914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:34,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:34,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:28:34,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72134774] [2022-01-18 15:28:34,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:34,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:28:34,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:28:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:28:34,418 INFO L87 Difference]: Start difference. First operand 1632 states and 5315 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) [2022-01-18 15:28:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:35,107 INFO L93 Difference]: Finished difference Result 2284 states and 7096 transitions. [2022-01-18 15:28:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:28:35,107 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 [2022-01-18 15:28:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:35,110 INFO L225 Difference]: With dead ends: 2284 [2022-01-18 15:28:35,110 INFO L226 Difference]: Without dead ends: 1817 [2022-01-18 15:28:35,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:28:35,110 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 164 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:35,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 478 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 867 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-01-18 15:28:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-01-18 15:28:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1632. [2022-01-18 15:28:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.2378908645003066) internal successors, (5281), 1631 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5281 transitions. [2022-01-18 15:28:35,127 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5281 transitions. Word has length 23 [2022-01-18 15:28:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:35,127 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5281 transitions. [2022-01-18 15:28:35,127 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) [2022-01-18 15:28:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5281 transitions. [2022-01-18 15:28:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:35,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:35,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:35,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:35,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:35,334 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1844204739, now seen corresponding path program 248 times [2022-01-18 15:28:35,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988715551] [2022-01-18 15:28:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:35,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:35,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:35,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988715551] [2022-01-18 15:28:35,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988715551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216422552] [2022-01-18 15:28:35,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:28:35,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:35,445 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) [2022-01-18 15:28:35,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 15:28:35,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:28:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:35,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:35,899 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 347 treesize of output 291 [2022-01-18 15:28:36,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:36,364 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-01-18 15:28:36,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:36,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:36,652 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 241 treesize of output 209 [2022-01-18 15:28:36,955 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:36,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:28:36,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:28:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:37,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216422552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:37,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:37,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:28:37,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114026740] [2022-01-18 15:28:37,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:37,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:28:37,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:28:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:28:37,105 INFO L87 Difference]: Start difference. First operand 1632 states and 5281 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) [2022-01-18 15:28:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:37,500 INFO L93 Difference]: Finished difference Result 2173 states and 6856 transitions. [2022-01-18 15:28:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:28:37,500 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 [2022-01-18 15:28:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:37,503 INFO L225 Difference]: With dead ends: 2173 [2022-01-18 15:28:37,503 INFO L226 Difference]: Without dead ends: 2154 [2022-01-18 15:28:37,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:28:37,503 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:37,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 493 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 695 Invalid, 0 Unknown, 638 Unchecked, 0.2s Time] [2022-01-18 15:28:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-01-18 15:28:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1640. [2022-01-18 15:28:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.2342892007321535) internal successors, (5301), 1639 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5301 transitions. [2022-01-18 15:28:37,525 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5301 transitions. Word has length 23 [2022-01-18 15:28:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:37,525 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5301 transitions. [2022-01-18 15:28:37,525 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) [2022-01-18 15:28:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5301 transitions. [2022-01-18 15:28:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:37,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:37,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:37,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:37,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:37,743 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash 308053179, now seen corresponding path program 249 times [2022-01-18 15:28:37,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:37,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199114467] [2022-01-18 15:28:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:37,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:37,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199114467] [2022-01-18 15:28:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199114467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804600140] [2022-01-18 15:28:37,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:28:37,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:37,848 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) [2022-01-18 15:28:37,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 15:28:38,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:28:38,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:38,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:38,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:38,213 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 218 treesize of output 188 [2022-01-18 15:28:38,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:38,659 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 15:28:38,661 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 134 treesize of output 120 [2022-01-18 15:28:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:38,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:38,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:39,121 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:39,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:28:39,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:28:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804600140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:39,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:39,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:28:39,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980610253] [2022-01-18 15:28:39,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:39,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:28:39,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:39,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:28:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:28:39,247 INFO L87 Difference]: Start difference. First operand 1640 states and 5301 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) [2022-01-18 15:28:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:39,477 INFO L93 Difference]: Finished difference Result 2035 states and 6397 transitions. [2022-01-18 15:28:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:28:39,477 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 [2022-01-18 15:28:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:39,480 INFO L225 Difference]: With dead ends: 2035 [2022-01-18 15:28:39,480 INFO L226 Difference]: Without dead ends: 2013 [2022-01-18 15:28:39,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:28:39,480 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:39,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 298 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 605 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-18 15:28:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2022-01-18 15:28:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1667. [2022-01-18 15:28:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.221488595438175) internal successors, (5367), 1666 states have internal predecessors, (5367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5367 transitions. [2022-01-18 15:28:39,498 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5367 transitions. Word has length 23 [2022-01-18 15:28:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:39,498 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 5367 transitions. [2022-01-18 15:28:39,498 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) [2022-01-18 15:28:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5367 transitions. [2022-01-18 15:28:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:39,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:39,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:39,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:39,717 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,SelfDestructingSolverStorable265 [2022-01-18 15:28:39,717 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -134845961, now seen corresponding path program 250 times [2022-01-18 15:28:39,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:39,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721975416] [2022-01-18 15:28:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:39,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:39,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:39,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721975416] [2022-01-18 15:28:39,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721975416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:39,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76466593] [2022-01-18 15:28:39,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:28:39,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:39,787 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) [2022-01-18 15:28:39,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 15:28:40,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:28:40,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:40,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:40,134 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 181 treesize of output 157 [2022-01-18 15:28:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:40,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:28:40,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:40,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:40,889 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 258 treesize of output 226 [2022-01-18 15:28:41,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:41,287 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:41,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:28:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:41,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76466593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:41,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:41,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:28:41,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226284057] [2022-01-18 15:28:41,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:41,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:28:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:28:41,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:28:41,441 INFO L87 Difference]: Start difference. First operand 1667 states and 5367 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) [2022-01-18 15:28:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:41,710 INFO L93 Difference]: Finished difference Result 2012 states and 6307 transitions. [2022-01-18 15:28:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:28:41,710 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 [2022-01-18 15:28:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:41,713 INFO L225 Difference]: With dead ends: 2012 [2022-01-18 15:28:41,713 INFO L226 Difference]: Without dead ends: 1996 [2022-01-18 15:28:41,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:28:41,713 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 90 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:41,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 289 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 619 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-01-18 15:28:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2022-01-18 15:28:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1674. [2022-01-18 15:28:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.217573221757322) internal successors, (5383), 1673 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5383 transitions. [2022-01-18 15:28:41,732 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5383 transitions. Word has length 23 [2022-01-18 15:28:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 5383 transitions. [2022-01-18 15:28:41,732 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) [2022-01-18 15:28:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5383 transitions. [2022-01-18 15:28:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:41,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:41,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:41,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:41,949 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,SelfDestructingSolverStorable266 [2022-01-18 15:28:41,950 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash -945896681, now seen corresponding path program 251 times [2022-01-18 15:28:41,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:41,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592086915] [2022-01-18 15:28:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:41,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:42,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:42,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592086915] [2022-01-18 15:28:42,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592086915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:42,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995254485] [2022-01-18 15:28:42,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:28:42,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:42,032 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) [2022-01-18 15:28:42,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 15:28:42,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:28:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:42,362 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 173 treesize of output 155 [2022-01-18 15:28:42,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:42,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:42,759 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:28:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:42,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:43,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:43,455 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 235 treesize of output 207 [2022-01-18 15:28:43,474 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:43,474 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 214 treesize of output 191 [2022-01-18 15:28:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:43,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995254485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:43,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:43,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:28:43,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719253473] [2022-01-18 15:28:43,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:43,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:28:43,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:28:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:28:43,632 INFO L87 Difference]: Start difference. First operand 1674 states and 5383 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) [2022-01-18 15:28:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:43,818 INFO L93 Difference]: Finished difference Result 2051 states and 6447 transitions. [2022-01-18 15:28:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:28:43,818 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 [2022-01-18 15:28:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:43,821 INFO L225 Difference]: With dead ends: 2051 [2022-01-18 15:28:43,821 INFO L226 Difference]: Without dead ends: 2035 [2022-01-18 15:28:43,821 INFO L932 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 [2022-01-18 15:28:43,821 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:43,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 218 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-18 15:28:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-01-18 15:28:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1678. [2022-01-18 15:28:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.2152653548002386) internal successors, (5392), 1677 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5392 transitions. [2022-01-18 15:28:43,840 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5392 transitions. Word has length 23 [2022-01-18 15:28:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:43,840 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5392 transitions. [2022-01-18 15:28:43,840 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) [2022-01-18 15:28:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5392 transitions. [2022-01-18 15:28:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:43,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:43,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:43,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:44,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:44,059 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1377576727, now seen corresponding path program 252 times [2022-01-18 15:28:44,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:44,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558539835] [2022-01-18 15:28:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:44,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:44,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558539835] [2022-01-18 15:28:44,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558539835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:44,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124360268] [2022-01-18 15:28:44,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:28:44,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:44,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:44,277 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) [2022-01-18 15:28:44,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 15:28:44,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:28:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:44,602 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 153 treesize of output 137 [2022-01-18 15:28:45,188 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 148 treesize of output 128 [2022-01-18 15:28:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:45,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:28:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:45,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:45,498 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 276 treesize of output 248 [2022-01-18 15:28:45,881 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 264 treesize of output 232 [2022-01-18 15:28:45,889 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:45,889 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 239 treesize of output 202 [2022-01-18 15:28:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:46,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124360268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:46,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:46,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:28:46,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43829714] [2022-01-18 15:28:46,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:46,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:28:46,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:28:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:28:46,076 INFO L87 Difference]: Start difference. First operand 1678 states and 5392 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) [2022-01-18 15:28:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:47,021 INFO L93 Difference]: Finished difference Result 2173 states and 6712 transitions. [2022-01-18 15:28:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:28:47,021 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 [2022-01-18 15:28:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:47,024 INFO L225 Difference]: With dead ends: 2173 [2022-01-18 15:28:47,024 INFO L226 Difference]: Without dead ends: 2127 [2022-01-18 15:28:47,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:28:47,024 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:47,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 469 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 763 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-01-18 15:28:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-01-18 15:28:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1682. [2022-01-18 15:28:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 3.2129684711481263) internal successors, (5401), 1681 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 5401 transitions. [2022-01-18 15:28:47,045 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 5401 transitions. Word has length 23 [2022-01-18 15:28:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:47,045 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 5401 transitions. [2022-01-18 15:28:47,045 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) [2022-01-18 15:28:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 5401 transitions. [2022-01-18 15:28:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:47,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:47,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:47,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:47,263 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,SelfDestructingSolverStorable268 [2022-01-18 15:28:47,263 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2040595503, now seen corresponding path program 253 times [2022-01-18 15:28:47,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:47,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136077274] [2022-01-18 15:28:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:47,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:47,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:47,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136077274] [2022-01-18 15:28:47,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136077274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:47,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224893034] [2022-01-18 15:28:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:28:47,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:47,414 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) [2022-01-18 15:28:47,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 15:28:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:28:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:47,763 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 173 treesize of output 149 [2022-01-18 15:28:48,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:48,576 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 282 [2022-01-18 15:28:48,579 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 274 treesize of output 242 [2022-01-18 15:28:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:48,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:48,927 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 188 treesize of output 164 [2022-01-18 15:28:49,317 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 258 treesize of output 222 [2022-01-18 15:28:49,324 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:49,324 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 230 treesize of output 199 [2022-01-18 15:28:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:49,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224893034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:49,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:49,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:28:49,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712237221] [2022-01-18 15:28:49,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:49,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:28:49,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:28:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:28:49,435 INFO L87 Difference]: Start difference. First operand 1682 states and 5401 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) [2022-01-18 15:28:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:50,617 INFO L93 Difference]: Finished difference Result 2317 states and 7185 transitions. [2022-01-18 15:28:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:28:50,618 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 [2022-01-18 15:28:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:50,621 INFO L225 Difference]: With dead ends: 2317 [2022-01-18 15:28:50,621 INFO L226 Difference]: Without dead ends: 2271 [2022-01-18 15:28:50,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:28:50,621 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:50,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 787 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1733 Invalid, 0 Unknown, 145 Unchecked, 0.5s Time] [2022-01-18 15:28:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-01-18 15:28:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1702. [2022-01-18 15:28:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.202821869488536) internal successors, (5448), 1701 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 5448 transitions. [2022-01-18 15:28:50,641 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 5448 transitions. Word has length 23 [2022-01-18 15:28:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:50,641 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 5448 transitions. [2022-01-18 15:28:50,641 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) [2022-01-18 15:28:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 5448 transitions. [2022-01-18 15:28:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:50,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:50,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:50,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-01-18 15:28:50,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-18 15:28:50,855 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash -293114143, now seen corresponding path program 254 times [2022-01-18 15:28:50,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142002058] [2022-01-18 15:28:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:50,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:50,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142002058] [2022-01-18 15:28:50,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142002058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923599015] [2022-01-18 15:28:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:28:50,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:50,981 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) [2022-01-18 15:28:50,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 15:28:51,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:28:51,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:51,317 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 153 treesize of output 137 [2022-01-18 15:28:52,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:52,022 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 240 [2022-01-18 15:28:52,025 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 214 treesize of output 186 [2022-01-18 15:28:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:52,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:52,498 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 247 treesize of output 213 [2022-01-18 15:28:52,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:52,867 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:52,867 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 211 [2022-01-18 15:28:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:53,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923599015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:53,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:53,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 15:28:53,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29851225] [2022-01-18 15:28:53,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:53,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:28:53,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:28:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:28:53,046 INFO L87 Difference]: Start difference. First operand 1702 states and 5448 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) [2022-01-18 15:28:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:53,589 INFO L93 Difference]: Finished difference Result 2233 states and 6934 transitions. [2022-01-18 15:28:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:28:53,589 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 [2022-01-18 15:28:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:53,592 INFO L225 Difference]: With dead ends: 2233 [2022-01-18 15:28:53,592 INFO L226 Difference]: Without dead ends: 2204 [2022-01-18 15:28:53,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:28:53,593 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:53,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 390 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 480 Invalid, 0 Unknown, 655 Unchecked, 0.2s Time] [2022-01-18 15:28:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-01-18 15:28:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1688. [2022-01-18 15:28:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.20746887966805) internal successors, (5411), 1687 states have internal predecessors, (5411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5411 transitions. [2022-01-18 15:28:53,612 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5411 transitions. Word has length 23 [2022-01-18 15:28:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:53,612 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5411 transitions. [2022-01-18 15:28:53,612 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) [2022-01-18 15:28:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5411 transitions. [2022-01-18 15:28:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:53,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:53,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:53,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:53,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-01-18 15:28:53,831 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash -966438973, now seen corresponding path program 255 times [2022-01-18 15:28:53,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052357654] [2022-01-18 15:28:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:53,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:53,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052357654] [2022-01-18 15:28:53,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052357654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093977875] [2022-01-18 15:28:53,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:28:53,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:53,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:53,919 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) [2022-01-18 15:28:53,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 15:28:54,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:28:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:54,267 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 136 treesize of output 120 [2022-01-18 15:28:54,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:54,702 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 238 [2022-01-18 15:28:54,706 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 236 treesize of output 200 [2022-01-18 15:28:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:54,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:54,987 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 197 treesize of output 177 [2022-01-18 15:28:55,385 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:55,385 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 263 [2022-01-18 15:28:55,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 217 [2022-01-18 15:28:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:55,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093977875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:55,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:55,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-01-18 15:28:55,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938085487] [2022-01-18 15:28:55,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:55,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:28:55,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:28:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:28:55,481 INFO L87 Difference]: Start difference. First operand 1688 states and 5411 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) [2022-01-18 15:28:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:56,572 INFO L93 Difference]: Finished difference Result 2596 states and 8035 transitions. [2022-01-18 15:28:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:28:56,573 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 [2022-01-18 15:28:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:56,576 INFO L225 Difference]: With dead ends: 2596 [2022-01-18 15:28:56,576 INFO L226 Difference]: Without dead ends: 2566 [2022-01-18 15:28:56,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:28:56,577 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 125 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 709 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:56,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 785 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1322 Invalid, 0 Unknown, 709 Unchecked, 0.3s Time] [2022-01-18 15:28:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-01-18 15:28:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1689. [2022-01-18 15:28:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.2067535545023698) internal successors, (5413), 1688 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5413 transitions. [2022-01-18 15:28:56,597 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5413 transitions. Word has length 23 [2022-01-18 15:28:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:56,598 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 5413 transitions. [2022-01-18 15:28:56,598 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) [2022-01-18 15:28:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5413 transitions. [2022-01-18 15:28:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:56,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:56,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:56,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-18 15:28:56,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:56,815 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:56,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1978366905, now seen corresponding path program 256 times [2022-01-18 15:28:56,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:56,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736517474] [2022-01-18 15:28:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:56,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:28:56,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736517474] [2022-01-18 15:28:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736517474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860106677] [2022-01-18 15:28:56,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:28:56,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:56,986 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) [2022-01-18 15:28:56,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 15:28:57,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:28:57,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:28:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:28:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:28:57,320 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 153 treesize of output 137 [2022-01-18 15:28:57,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:28:57,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:28:57,858 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 161 treesize of output 145 [2022-01-18 15:28:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:58,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:28:58,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:28:58,400 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:28:58,400 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 191 treesize of output 168 [2022-01-18 15:28:58,405 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 [2022-01-18 15:28:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:28:58,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860106677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:28:58,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:28:58,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 15:28:58,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755019145] [2022-01-18 15:28:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:28:58,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:28:58,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:28:58,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:28:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:28:58,512 INFO L87 Difference]: Start difference. First operand 1689 states and 5413 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) [2022-01-18 15:28:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:28:59,652 INFO L93 Difference]: Finished difference Result 2553 states and 8074 transitions. [2022-01-18 15:28:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:28:59,653 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 [2022-01-18 15:28:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:28:59,656 INFO L225 Difference]: With dead ends: 2553 [2022-01-18 15:28:59,656 INFO L226 Difference]: Without dead ends: 2420 [2022-01-18 15:28:59,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:28:59,657 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 173 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:28:59,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 617 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 295 Unchecked, 0.4s Time] [2022-01-18 15:28:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-01-18 15:28:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1749. [2022-01-18 15:28:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.2048054919908466) internal successors, (5602), 1748 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:28:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5602 transitions. [2022-01-18 15:28:59,676 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5602 transitions. Word has length 23 [2022-01-18 15:28:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:28:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 5602 transitions. [2022-01-18 15:28:59,676 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) [2022-01-18 15:28:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5602 transitions. [2022-01-18 15:28:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:28:59,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:28:59,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:28:59,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 15:28:59,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:59,885 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:28:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:28:59,885 INFO L85 PathProgramCache]: Analyzing trace with hash -969090893, now seen corresponding path program 257 times [2022-01-18 15:28:59,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:28:59,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801983412] [2022-01-18 15:28:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:28:59,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:28:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:28:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:28:59,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:28:59,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801983412] [2022-01-18 15:28:59,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801983412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:28:59,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775163669] [2022-01-18 15:28:59,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:28:59,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:28:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:28:59,956 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) [2022-01-18 15:28:59,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 15:29:00,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:00,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:00,789 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 145 treesize of output 125 [2022-01-18 15:29:00,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:00,791 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 144 treesize of output 126 [2022-01-18 15:29:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:00,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:01,224 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 310 treesize of output 270 [2022-01-18 15:29:01,575 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:01,575 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 191 treesize of output 168 [2022-01-18 15:29:01,580 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 [2022-01-18 15:29:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:01,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775163669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:01,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:01,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:29:01,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612536843] [2022-01-18 15:29:01,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:01,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:29:01,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:29:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:29:01,707 INFO L87 Difference]: Start difference. First operand 1749 states and 5602 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) [2022-01-18 15:29:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:02,184 INFO L93 Difference]: Finished difference Result 2721 states and 8444 transitions. [2022-01-18 15:29:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:29:02,184 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 [2022-01-18 15:29:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:02,188 INFO L225 Difference]: With dead ends: 2721 [2022-01-18 15:29:02,188 INFO L226 Difference]: Without dead ends: 2421 [2022-01-18 15:29:02,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:29:02,188 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:02,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 334 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 676 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-01-18 15:29:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-01-18 15:29:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2009. [2022-01-18 15:29:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.1633466135458166) internal successors, (6352), 2008 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6352 transitions. [2022-01-18 15:29:02,210 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6352 transitions. Word has length 23 [2022-01-18 15:29:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:02,210 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 6352 transitions. [2022-01-18 15:29:02,210 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) [2022-01-18 15:29:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6352 transitions. [2022-01-18 15:29:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:02,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:02,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:02,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:02,436 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,SelfDestructingSolverStorable273 [2022-01-18 15:29:02,436 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:02,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:02,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1069698957, now seen corresponding path program 258 times [2022-01-18 15:29:02,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:02,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198003644] [2022-01-18 15:29:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:02,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:02,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198003644] [2022-01-18 15:29:02,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198003644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180762946] [2022-01-18 15:29:02,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:29:02,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:02,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:02,535 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) [2022-01-18 15:29:02,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 15:29:02,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:29:02,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:02,860 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 136 treesize of output 120 [2022-01-18 15:29:03,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:03,315 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 265 [2022-01-18 15:29:03,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 235 [2022-01-18 15:29:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:03,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:03,797 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 188 treesize of output 164 [2022-01-18 15:29:04,152 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 171 treesize of output 151 [2022-01-18 15:29:04,157 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:04,157 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 172 treesize of output 153 [2022-01-18 15:29:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180762946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:04,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:04,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-01-18 15:29:04,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501086726] [2022-01-18 15:29:04,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:04,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:04,233 INFO L87 Difference]: Start difference. First operand 2009 states and 6352 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) [2022-01-18 15:29:04,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:04,703 INFO L93 Difference]: Finished difference Result 2952 states and 9000 transitions. [2022-01-18 15:29:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:29:04,704 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 [2022-01-18 15:29:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:04,707 INFO L225 Difference]: With dead ends: 2952 [2022-01-18 15:29:04,707 INFO L226 Difference]: Without dead ends: 2889 [2022-01-18 15:29:04,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:29:04,707 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:04,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 479 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 792 Invalid, 0 Unknown, 404 Unchecked, 0.2s Time] [2022-01-18 15:29:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2022-01-18 15:29:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2202. [2022-01-18 15:29:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.1549295774647885) internal successors, (6944), 2201 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6944 transitions. [2022-01-18 15:29:04,733 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6944 transitions. Word has length 23 [2022-01-18 15:29:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:04,733 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 6944 transitions. [2022-01-18 15:29:04,733 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) [2022-01-18 15:29:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6944 transitions. [2022-01-18 15:29:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:04,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:04,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:04,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:04,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:04,953 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash -799004779, now seen corresponding path program 259 times [2022-01-18 15:29:04,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:04,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111536436] [2022-01-18 15:29:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:04,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:05,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111536436] [2022-01-18 15:29:05,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111536436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351610527] [2022-01-18 15:29:05,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:29:05,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:05,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:05,020 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) [2022-01-18 15:29:05,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 15:29:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:05,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:05,390 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 181 treesize of output 157 [2022-01-18 15:29:06,034 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 165 treesize of output 141 [2022-01-18 15:29:06,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:06,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:29:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:06,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:06,623 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 335 treesize of output 293 [2022-01-18 15:29:07,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:07,094 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:07,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:29:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:07,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351610527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:07,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:07,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:07,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694454514] [2022-01-18 15:29:07,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:07,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:07,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:07,223 INFO L87 Difference]: Start difference. First operand 2202 states and 6944 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) [2022-01-18 15:29:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:09,714 INFO L93 Difference]: Finished difference Result 4411 states and 12930 transitions. [2022-01-18 15:29:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 15:29:09,714 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 [2022-01-18 15:29:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:09,720 INFO L225 Difference]: With dead ends: 4411 [2022-01-18 15:29:09,721 INFO L226 Difference]: Without dead ends: 4290 [2022-01-18 15:29:09,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1115, Invalid=9391, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 15:29:09,721 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 188 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1482 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:09,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1065 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1152 Invalid, 0 Unknown, 1482 Unchecked, 0.4s Time] [2022-01-18 15:29:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2022-01-18 15:29:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 2363. [2022-01-18 15:29:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2362 states have (on average 3.1227773073666385) internal successors, (7376), 2362 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 7376 transitions. [2022-01-18 15:29:09,757 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 7376 transitions. Word has length 23 [2022-01-18 15:29:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:09,758 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 7376 transitions. [2022-01-18 15:29:09,758 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) [2022-01-18 15:29:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 7376 transitions. [2022-01-18 15:29:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:09,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:09,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:09,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:09,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:09,979 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash 321971773, now seen corresponding path program 260 times [2022-01-18 15:29:09,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:09,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482073343] [2022-01-18 15:29:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:09,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:10,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482073343] [2022-01-18 15:29:10,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482073343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399693997] [2022-01-18 15:29:10,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:29:10,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:10,070 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) [2022-01-18 15:29:10,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 15:29:10,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:10,409 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 173 treesize of output 149 [2022-01-18 15:29:10,965 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 145 treesize of output 125 [2022-01-18 15:29:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:10,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 143 treesize of output 125 [2022-01-18 15:29:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:11,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:11,402 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 235 treesize of output 211 [2022-01-18 15:29:11,732 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:11,732 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 243 treesize of output 216 [2022-01-18 15:29:11,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 179 [2022-01-18 15:29:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:11,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399693997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:11,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:11,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:11,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261802063] [2022-01-18 15:29:11,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:11,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:11,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:11,836 INFO L87 Difference]: Start difference. First operand 2363 states and 7376 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) [2022-01-18 15:29:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:12,731 INFO L93 Difference]: Finished difference Result 3281 states and 9813 transitions. [2022-01-18 15:29:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:29:12,731 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 [2022-01-18 15:29:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:12,736 INFO L225 Difference]: With dead ends: 3281 [2022-01-18 15:29:12,736 INFO L226 Difference]: Without dead ends: 3186 [2022-01-18 15:29:12,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=2568, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:29:12,736 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:12,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 865 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1459 Invalid, 0 Unknown, 412 Unchecked, 0.4s Time] [2022-01-18 15:29:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2022-01-18 15:29:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2398. [2022-01-18 15:29:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.108886107634543) internal successors, (7452), 2397 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7452 transitions. [2022-01-18 15:29:12,764 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7452 transitions. Word has length 23 [2022-01-18 15:29:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:12,764 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 7452 transitions. [2022-01-18 15:29:12,764 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) [2022-01-18 15:29:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7452 transitions. [2022-01-18 15:29:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:12,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:12,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:12,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:12,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:12,974 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:12,975 INFO L85 PathProgramCache]: Analyzing trace with hash -277403401, now seen corresponding path program 261 times [2022-01-18 15:29:12,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:12,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308920879] [2022-01-18 15:29:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:12,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:13,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308920879] [2022-01-18 15:29:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308920879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820586899] [2022-01-18 15:29:13,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:29:13,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:13,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:13,058 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) [2022-01-18 15:29:13,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 15:29:13,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:29:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:13,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 243 [2022-01-18 15:29:13,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:13,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:29:13,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:13,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:14,004 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 218 treesize of output 198 [2022-01-18 15:29:14,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:14,291 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:14,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 170 [2022-01-18 15:29:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:14,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820586899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:14,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:14,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:29:14,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767267170] [2022-01-18 15:29:14,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:29:14,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:29:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:29:14,423 INFO L87 Difference]: Start difference. First operand 2398 states and 7452 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) [2022-01-18 15:29:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:14,543 INFO L93 Difference]: Finished difference Result 2616 states and 8086 transitions. [2022-01-18 15:29:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:29:14,543 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 [2022-01-18 15:29:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:14,546 INFO L225 Difference]: With dead ends: 2616 [2022-01-18 15:29:14,546 INFO L226 Difference]: Without dead ends: 2585 [2022-01-18 15:29:14,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:14,546 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:14,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 224 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 362 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-01-18 15:29:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-01-18 15:29:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2400. [2022-01-18 15:29:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.1096290120883703) internal successors, (7460), 2399 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7460 transitions. [2022-01-18 15:29:14,570 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7460 transitions. Word has length 23 [2022-01-18 15:29:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:14,570 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7460 transitions. [2022-01-18 15:29:14,570 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) [2022-01-18 15:29:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7460 transitions. [2022-01-18 15:29:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:14,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:14,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:14,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:14,775 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,SelfDestructingSolverStorable277 [2022-01-18 15:29:14,775 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash -310640325, now seen corresponding path program 262 times [2022-01-18 15:29:14,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:14,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130316920] [2022-01-18 15:29:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:14,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:14,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130316920] [2022-01-18 15:29:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130316920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839127911] [2022-01-18 15:29:14,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:29:14,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:14,857 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) [2022-01-18 15:29:14,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 15:29:15,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:29:15,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:15,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:15,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 196 [2022-01-18 15:29:15,516 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 128 treesize of output 112 [2022-01-18 15:29:15,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:15,518 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 144 treesize of output 126 [2022-01-18 15:29:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:15,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:15,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:16,092 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 247 treesize of output 219 [2022-01-18 15:29:16,101 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:16,101 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 226 treesize of output 203 [2022-01-18 15:29:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:16,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839127911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:16,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:16,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:16,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126190907] [2022-01-18 15:29:16,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:16,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:16,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:16,266 INFO L87 Difference]: Start difference. First operand 2400 states and 7460 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) [2022-01-18 15:29:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:16,450 INFO L93 Difference]: Finished difference Result 2770 states and 8560 transitions. [2022-01-18 15:29:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:29:16,451 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 [2022-01-18 15:29:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:16,454 INFO L225 Difference]: With dead ends: 2770 [2022-01-18 15:29:16,454 INFO L226 Difference]: Without dead ends: 2694 [2022-01-18 15:29:16,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:29:16,454 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:16,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 234 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 435 Invalid, 0 Unknown, 360 Unchecked, 0.1s Time] [2022-01-18 15:29:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2022-01-18 15:29:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2420. [2022-01-18 15:29:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.107069036792063) internal successors, (7516), 2419 states have internal predecessors, (7516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7516 transitions. [2022-01-18 15:29:16,480 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7516 transitions. Word has length 23 [2022-01-18 15:29:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:16,480 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 7516 transitions. [2022-01-18 15:29:16,480 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) [2022-01-18 15:29:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7516 transitions. [2022-01-18 15:29:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:16,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:16,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:16,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:16,687 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,SelfDestructingSolverStorable278 [2022-01-18 15:29:16,687 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1036869173, now seen corresponding path program 263 times [2022-01-18 15:29:16,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:16,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878968868] [2022-01-18 15:29:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:16,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:16,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878968868] [2022-01-18 15:29:16,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878968868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828311742] [2022-01-18 15:29:16,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:29:16,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:16,805 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) [2022-01-18 15:29:16,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 15:29:17,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:17,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:17,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:17,177 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 229 treesize of output 195 [2022-01-18 15:29:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:17,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 235 [2022-01-18 15:29:17,914 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 227 treesize of output 191 [2022-01-18 15:29:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:18,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:18,346 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 197 treesize of output 177 [2022-01-18 15:29:18,739 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 188 treesize of output 164 [2022-01-18 15:29:18,745 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:18,746 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 172 treesize of output 153 [2022-01-18 15:29:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:18,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828311742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:18,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:18,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:18,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945502792] [2022-01-18 15:29:18,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:18,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:18,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:18,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:18,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:18,848 INFO L87 Difference]: Start difference. First operand 2420 states and 7516 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) [2022-01-18 15:29:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:21,649 INFO L93 Difference]: Finished difference Result 4946 states and 14558 transitions. [2022-01-18 15:29:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 15:29:21,649 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 23 [2022-01-18 15:29:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:21,656 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 15:29:21,656 INFO L226 Difference]: Without dead ends: 4731 [2022-01-18 15:29:21,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1276, Invalid=12530, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 15:29:21,657 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 244 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:21,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1034 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1849 Invalid, 0 Unknown, 467 Unchecked, 0.6s Time] [2022-01-18 15:29:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-01-18 15:29:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 1905. [2022-01-18 15:29:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.138655462184874) internal successors, (5976), 1904 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 5976 transitions. [2022-01-18 15:29:21,692 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 5976 transitions. Word has length 23 [2022-01-18 15:29:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:21,693 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 5976 transitions. [2022-01-18 15:29:21,693 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) [2022-01-18 15:29:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 5976 transitions. [2022-01-18 15:29:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:21,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:21,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:21,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:21,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 15:29:21,911 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1977952887, now seen corresponding path program 264 times [2022-01-18 15:29:21,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332875798] [2022-01-18 15:29:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:21,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:22,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332875798] [2022-01-18 15:29:22,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332875798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161820912] [2022-01-18 15:29:22,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:29:22,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:22,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:22,074 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) [2022-01-18 15:29:22,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 15:29:22,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:29:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:22,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 245 [2022-01-18 15:29:22,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:22,847 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-01-18 15:29:22,850 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 140 treesize of output 126 [2022-01-18 15:29:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:22,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:23,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:23,455 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 312 treesize of output 272 [2022-01-18 15:29:23,463 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:23,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:29:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:23,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161820912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:23,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:29:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102615381] [2022-01-18 15:29:23,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:23,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:29:23,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:29:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:29:23,625 INFO L87 Difference]: Start difference. First operand 1905 states and 5976 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) [2022-01-18 15:29:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:25,101 INFO L93 Difference]: Finished difference Result 3422 states and 10432 transitions. [2022-01-18 15:29:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:29:25,102 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 [2022-01-18 15:29:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:25,106 INFO L225 Difference]: With dead ends: 3422 [2022-01-18 15:29:25,106 INFO L226 Difference]: Without dead ends: 3255 [2022-01-18 15:29:25,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=389, Invalid=3033, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:29:25,106 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 167 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:25,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 776 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1319 Invalid, 0 Unknown, 561 Unchecked, 0.4s Time] [2022-01-18 15:29:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-01-18 15:29:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2034. [2022-01-18 15:29:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.1200196753566156) internal successors, (6343), 2033 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6343 transitions. [2022-01-18 15:29:25,132 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6343 transitions. Word has length 23 [2022-01-18 15:29:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:25,132 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 6343 transitions. [2022-01-18 15:29:25,132 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) [2022-01-18 15:29:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6343 transitions. [2022-01-18 15:29:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:25,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:25,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:25,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:25,339 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,SelfDestructingSolverStorable280 [2022-01-18 15:29:25,339 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -809658257, now seen corresponding path program 265 times [2022-01-18 15:29:25,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:25,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902362524] [2022-01-18 15:29:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:25,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:25,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:25,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902362524] [2022-01-18 15:29:25,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902362524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:25,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353872329] [2022-01-18 15:29:25,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:29:25,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:25,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:25,432 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) [2022-01-18 15:29:25,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 15:29:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:25,871 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 279 treesize of output 239 [2022-01-18 15:29:26,095 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 148 treesize of output 128 [2022-01-18 15:29:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:26,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:29:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:26,519 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 258 treesize of output 222 [2022-01-18 15:29:26,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:26,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:26,773 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 220 treesize of output 202 [2022-01-18 15:29:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:26,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353872329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:26,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:26,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:29:26,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160431513] [2022-01-18 15:29:26,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:26,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:29:26,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:26,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:29:26,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:29:26,902 INFO L87 Difference]: Start difference. First operand 2034 states and 6343 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) [2022-01-18 15:29:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:27,510 INFO L93 Difference]: Finished difference Result 2658 states and 8171 transitions. [2022-01-18 15:29:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:29:27,510 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 [2022-01-18 15:29:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:27,513 INFO L225 Difference]: With dead ends: 2658 [2022-01-18 15:29:27,513 INFO L226 Difference]: Without dead ends: 2558 [2022-01-18 15:29:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:29:27,514 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 159 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:27,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 326 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 912 Invalid, 0 Unknown, 287 Unchecked, 0.3s Time] [2022-01-18 15:29:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-01-18 15:29:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2085. [2022-01-18 15:29:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 3.1501919385796544) internal successors, (6565), 2084 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 6565 transitions. [2022-01-18 15:29:27,536 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 6565 transitions. Word has length 23 [2022-01-18 15:29:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:27,536 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 6565 transitions. [2022-01-18 15:29:27,536 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) [2022-01-18 15:29:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 6565 transitions. [2022-01-18 15:29:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:27,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:27,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:27,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:27,743 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash 866346175, now seen corresponding path program 266 times [2022-01-18 15:29:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:27,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603134437] [2022-01-18 15:29:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:27,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:27,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603134437] [2022-01-18 15:29:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603134437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532483687] [2022-01-18 15:29:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:29:27,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:27,855 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) [2022-01-18 15:29:27,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 15:29:28,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:28,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:28,225 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 173 treesize of output 155 [2022-01-18 15:29:28,710 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 210 treesize of output 176 [2022-01-18 15:29:28,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:28,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 208 treesize of output 180 [2022-01-18 15:29:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:28,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:29,125 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 218 treesize of output 198 [2022-01-18 15:29:29,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:29,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:29,510 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 235 treesize of output 209 [2022-01-18 15:29:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:29,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532483687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:29,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:29,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:29:29,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30738285] [2022-01-18 15:29:29,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:29,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:29:29,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:29:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:29:29,716 INFO L87 Difference]: Start difference. First operand 2085 states and 6565 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-01-18 15:29:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:29,929 INFO L93 Difference]: Finished difference Result 2479 states and 7654 transitions. [2022-01-18 15:29:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:29:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 [2022-01-18 15:29:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:29,932 INFO L225 Difference]: With dead ends: 2479 [2022-01-18 15:29:29,932 INFO L226 Difference]: Without dead ends: 2391 [2022-01-18 15:29:29,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:29,933 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:29,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 264 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 636 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-18 15:29:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-01-18 15:29:29,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2122. [2022-01-18 15:29:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 3.1532296086751535) internal successors, (6688), 2121 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 6688 transitions. [2022-01-18 15:29:29,955 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 6688 transitions. Word has length 23 [2022-01-18 15:29:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:29,956 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 6688 transitions. [2022-01-18 15:29:29,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-01-18 15:29:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 6688 transitions. [2022-01-18 15:29:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:29,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:29,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:29,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:30,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-18 15:29:30,166 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash -892942965, now seen corresponding path program 267 times [2022-01-18 15:29:30,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:30,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854251399] [2022-01-18 15:29:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:30,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:30,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854251399] [2022-01-18 15:29:30,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854251399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321318992] [2022-01-18 15:29:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:29:30,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:30,263 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) [2022-01-18 15:29:30,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 15:29:30,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:29:30,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:30,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:30,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 265 [2022-01-18 15:29:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:31,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 230 treesize of output 198 [2022-01-18 15:29:31,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:31,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:31,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:32,148 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:32,148 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 279 treesize of output 252 [2022-01-18 15:29:32,154 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 251 treesize of output 207 [2022-01-18 15:29:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:32,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321318992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:32,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:32,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:32,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334944844] [2022-01-18 15:29:32,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:32,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:32,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:32,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:32,341 INFO L87 Difference]: Start difference. First operand 2122 states and 6688 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) [2022-01-18 15:29:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:33,337 INFO L93 Difference]: Finished difference Result 2806 states and 8769 transitions. [2022-01-18 15:29:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:29:33,337 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 [2022-01-18 15:29:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:33,341 INFO L225 Difference]: With dead ends: 2806 [2022-01-18 15:29:33,341 INFO L226 Difference]: Without dead ends: 2666 [2022-01-18 15:29:33,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:29:33,342 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 144 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:33,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 679 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1024 Invalid, 0 Unknown, 210 Unchecked, 0.4s Time] [2022-01-18 15:29:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2022-01-18 15:29:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2147. [2022-01-18 15:29:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.1612301957129545) internal successors, (6784), 2146 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6784 transitions. [2022-01-18 15:29:33,365 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6784 transitions. Word has length 23 [2022-01-18 15:29:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:33,365 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 6784 transitions. [2022-01-18 15:29:33,365 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) [2022-01-18 15:29:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6784 transitions. [2022-01-18 15:29:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:33,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:33,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:33,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 15:29:33,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:33,570 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1074695619, now seen corresponding path program 268 times [2022-01-18 15:29:33,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963870858] [2022-01-18 15:29:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:33,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:33,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963870858] [2022-01-18 15:29:33,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963870858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66597927] [2022-01-18 15:29:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:29:33,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:33,673 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) [2022-01-18 15:29:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 15:29:33,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:29:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:34,054 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 173 treesize of output 155 [2022-01-18 15:29:34,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:34,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 15:29:34,584 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 134 treesize of output 120 [2022-01-18 15:29:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:34,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:34,960 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 222 treesize of output 190 [2022-01-18 15:29:35,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:35,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 179 [2022-01-18 15:29:35,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:35,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66597927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:35,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:35,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:29:35,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641910963] [2022-01-18 15:29:35,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:35,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:29:35,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:29:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:29:35,545 INFO L87 Difference]: Start difference. First operand 2147 states and 6784 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-01-18 15:29:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:35,987 INFO L93 Difference]: Finished difference Result 2587 states and 8004 transitions. [2022-01-18 15:29:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:29:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 [2022-01-18 15:29:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:35,991 INFO L225 Difference]: With dead ends: 2587 [2022-01-18 15:29:35,991 INFO L226 Difference]: Without dead ends: 2540 [2022-01-18 15:29:35,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:29:35,991 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 125 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:35,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 281 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 827 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-01-18 15:29:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-01-18 15:29:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2156. [2022-01-18 15:29:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.1638051044083526) internal successors, (6818), 2155 states have internal predecessors, (6818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 6818 transitions. [2022-01-18 15:29:36,014 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 6818 transitions. Word has length 23 [2022-01-18 15:29:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:36,014 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 6818 transitions. [2022-01-18 15:29:36,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-01-18 15:29:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 6818 transitions. [2022-01-18 15:29:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:36,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:36,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:36,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:36,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:36,222 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash -846198653, now seen corresponding path program 269 times [2022-01-18 15:29:36,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525353748] [2022-01-18 15:29:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:36,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:36,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525353748] [2022-01-18 15:29:36,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525353748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305417941] [2022-01-18 15:29:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:29:36,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:36,297 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) [2022-01-18 15:29:36,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 15:29:36,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:36,660 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 181 treesize of output 157 [2022-01-18 15:29:37,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:37,175 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 246 [2022-01-18 15:29:37,178 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 220 treesize of output 194 [2022-01-18 15:29:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:37,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:37,455 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 258 treesize of output 218 [2022-01-18 15:29:37,715 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 233 treesize of output 205 [2022-01-18 15:29:37,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:37,722 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 218 treesize of output 200 [2022-01-18 15:29:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305417941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:37,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526244308] [2022-01-18 15:29:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:37,901 INFO L87 Difference]: Start difference. First operand 2156 states and 6818 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) [2022-01-18 15:29:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:38,111 INFO L93 Difference]: Finished difference Result 2621 states and 8084 transitions. [2022-01-18 15:29:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:29:38,111 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 [2022-01-18 15:29:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:38,115 INFO L225 Difference]: With dead ends: 2621 [2022-01-18 15:29:38,115 INFO L226 Difference]: Without dead ends: 2537 [2022-01-18 15:29:38,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:29:38,115 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:38,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 269 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 698 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-01-18 15:29:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-01-18 15:29:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2145. [2022-01-18 15:29:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.1613805970149254) internal successors, (6778), 2144 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 6778 transitions. [2022-01-18 15:29:38,138 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 6778 transitions. Word has length 23 [2022-01-18 15:29:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:38,138 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 6778 transitions. [2022-01-18 15:29:38,138 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) [2022-01-18 15:29:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 6778 transitions. [2022-01-18 15:29:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:38,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:38,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:38,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:38,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:38,357 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2030290795, now seen corresponding path program 270 times [2022-01-18 15:29:38,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170408536] [2022-01-18 15:29:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:38,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:38,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170408536] [2022-01-18 15:29:38,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170408536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662518974] [2022-01-18 15:29:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:29:38,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:38,425 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) [2022-01-18 15:29:38,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 15:29:38,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:29:38,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:38,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:38,835 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 239 treesize of output 213 [2022-01-18 15:29:39,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:39,165 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 227 treesize of output 197 [2022-01-18 15:29:39,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:39,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:39,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:39,895 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 233 treesize of output 205 [2022-01-18 15:29:39,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:39,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:29:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:40,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662518974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:40,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:40,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:29:40,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881485165] [2022-01-18 15:29:40,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:40,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:29:40,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:29:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:29:40,167 INFO L87 Difference]: Start difference. First operand 2145 states and 6778 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) [2022-01-18 15:29:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:40,442 INFO L93 Difference]: Finished difference Result 2527 states and 7796 transitions. [2022-01-18 15:29:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:29:40,442 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 [2022-01-18 15:29:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:40,445 INFO L225 Difference]: With dead ends: 2527 [2022-01-18 15:29:40,445 INFO L226 Difference]: Without dead ends: 2469 [2022-01-18 15:29:40,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:29:40,446 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:40,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 380 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 755 Invalid, 0 Unknown, 373 Unchecked, 0.2s Time] [2022-01-18 15:29:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-01-18 15:29:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2165. [2022-01-18 15:29:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 3.1589648798521255) internal successors, (6836), 2164 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6836 transitions. [2022-01-18 15:29:40,468 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6836 transitions. Word has length 23 [2022-01-18 15:29:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:40,468 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 6836 transitions. [2022-01-18 15:29:40,468 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) [2022-01-18 15:29:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6836 transitions. [2022-01-18 15:29:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:40,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:40,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:40,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:40,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:40,688 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1012219861, now seen corresponding path program 271 times [2022-01-18 15:29:40,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198010341] [2022-01-18 15:29:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:40,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198010341] [2022-01-18 15:29:40,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198010341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568743429] [2022-01-18 15:29:40,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:29:40,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:40,749 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) [2022-01-18 15:29:40,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 15:29:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:41,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:41,123 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 226 treesize of output 206 [2022-01-18 15:29:41,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:41,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 239 [2022-01-18 15:29:41,661 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 231 treesize of output 199 [2022-01-18 15:29:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:41,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:42,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:42,385 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:42,385 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-01-18 15:29:42,391 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 [2022-01-18 15:29:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:42,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568743429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:42,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:42,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:42,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281774908] [2022-01-18 15:29:42,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:42,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:42,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:42,599 INFO L87 Difference]: Start difference. First operand 2165 states and 6836 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) [2022-01-18 15:29:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:43,434 INFO L93 Difference]: Finished difference Result 3015 states and 9303 transitions. [2022-01-18 15:29:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:29:43,434 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 [2022-01-18 15:29:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:43,439 INFO L225 Difference]: With dead ends: 3015 [2022-01-18 15:29:43,439 INFO L226 Difference]: Without dead ends: 2957 [2022-01-18 15:29:43,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=2384, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:29:43,440 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:43,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 746 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1373 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-01-18 15:29:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-01-18 15:29:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2192. [2022-01-18 15:29:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 3.1547238703788225) internal successors, (6912), 2191 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 6912 transitions. [2022-01-18 15:29:43,471 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 6912 transitions. Word has length 23 [2022-01-18 15:29:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:43,471 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 6912 transitions. [2022-01-18 15:29:43,471 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) [2022-01-18 15:29:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 6912 transitions. [2022-01-18 15:29:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:43,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:43,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:43,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:43,687 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,SelfDestructingSolverStorable287 [2022-01-18 15:29:43,687 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash -80373479, now seen corresponding path program 272 times [2022-01-18 15:29:43,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914999812] [2022-01-18 15:29:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:43,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:43,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914999812] [2022-01-18 15:29:43,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914999812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598943351] [2022-01-18 15:29:43,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:29:43,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:43,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:43,798 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) [2022-01-18 15:29:43,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 15:29:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:44,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:44,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:44,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:44,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:44,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:44,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 223 treesize of output 191 [2022-01-18 15:29:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:44,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:45,073 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 312 treesize of output 272 [2022-01-18 15:29:45,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:45,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 152 [2022-01-18 15:29:45,295 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 143 treesize of output 127 [2022-01-18 15:29:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:45,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598943351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:45,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:45,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:29:45,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333106981] [2022-01-18 15:29:45,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:45,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:29:45,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:45,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:29:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:29:45,544 INFO L87 Difference]: Start difference. First operand 2192 states and 6912 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) [2022-01-18 15:29:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:46,014 INFO L93 Difference]: Finished difference Result 2984 states and 9211 transitions. [2022-01-18 15:29:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:29:46,014 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 [2022-01-18 15:29:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:46,018 INFO L225 Difference]: With dead ends: 2984 [2022-01-18 15:29:46,018 INFO L226 Difference]: Without dead ends: 2837 [2022-01-18 15:29:46,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:29:46,018 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 253 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:46,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 306 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 981 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-01-18 15:29:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2022-01-18 15:29:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2258. [2022-01-18 15:29:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2257 states have (on average 3.1922906513070446) internal successors, (7205), 2257 states have internal predecessors, (7205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 7205 transitions. [2022-01-18 15:29:46,044 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 7205 transitions. Word has length 23 [2022-01-18 15:29:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:46,044 INFO L470 AbstractCegarLoop]: Abstraction has 2258 states and 7205 transitions. [2022-01-18 15:29:46,044 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) [2022-01-18 15:29:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 7205 transitions. [2022-01-18 15:29:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:46,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:46,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:46,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:46,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 15:29:46,251 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1580868817, now seen corresponding path program 273 times [2022-01-18 15:29:46,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374452850] [2022-01-18 15:29:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:46,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:29:46,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374452850] [2022-01-18 15:29:46,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374452850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258122756] [2022-01-18 15:29:46,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:29:46,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:46,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:46,335 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) [2022-01-18 15:29:46,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 15:29:46,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:29:46,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:46,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:29:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:46,728 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 226 treesize of output 206 [2022-01-18 15:29:47,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:47,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:47,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:29:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:47,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:47,679 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 206 treesize of output 186 [2022-01-18 15:29:48,136 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:48,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 212 [2022-01-18 15:29:48,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-01-18 15:29:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:48,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258122756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:48,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:48,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:29:48,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324061797] [2022-01-18 15:29:48,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:48,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:29:48,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:29:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:29:48,322 INFO L87 Difference]: Start difference. First operand 2258 states and 7205 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) [2022-01-18 15:29:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:50,310 INFO L93 Difference]: Finished difference Result 3005 states and 9456 transitions. [2022-01-18 15:29:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:29:50,310 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 [2022-01-18 15:29:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:50,314 INFO L225 Difference]: With dead ends: 3005 [2022-01-18 15:29:50,314 INFO L226 Difference]: Without dead ends: 2861 [2022-01-18 15:29:50,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=370, Invalid=3170, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:29:50,315 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 204 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 878 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:50,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 998 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1668 Invalid, 0 Unknown, 878 Unchecked, 0.6s Time] [2022-01-18 15:29:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2022-01-18 15:29:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2289. [2022-01-18 15:29:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 3.195804195804196) internal successors, (7312), 2288 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 7312 transitions. [2022-01-18 15:29:50,339 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 7312 transitions. Word has length 23 [2022-01-18 15:29:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:50,339 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 7312 transitions. [2022-01-18 15:29:50,339 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) [2022-01-18 15:29:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 7312 transitions. [2022-01-18 15:29:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:50,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:50,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:50,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:50,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 15:29:50,559 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash 503222865, now seen corresponding path program 274 times [2022-01-18 15:29:50,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:50,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431766070] [2022-01-18 15:29:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:50,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:50,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:50,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431766070] [2022-01-18 15:29:50,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431766070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:50,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587118320] [2022-01-18 15:29:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:29:50,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:50,676 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) [2022-01-18 15:29:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 15:29:50,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:29:50,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:51,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:51,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:51,326 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-01-18 15:29:51,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:51,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:51,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:52,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:52,109 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:52,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 241 [2022-01-18 15:29:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:52,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587118320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:52,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:52,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:29:52,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071971787] [2022-01-18 15:29:52,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:52,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:29:52,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:29:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:29:52,221 INFO L87 Difference]: Start difference. First operand 2289 states and 7312 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) [2022-01-18 15:29:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:53,188 INFO L93 Difference]: Finished difference Result 2910 states and 9119 transitions. [2022-01-18 15:29:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:29:53,188 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 [2022-01-18 15:29:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:53,192 INFO L225 Difference]: With dead ends: 2910 [2022-01-18 15:29:53,192 INFO L226 Difference]: Without dead ends: 2805 [2022-01-18 15:29:53,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=2230, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:29:53,192 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 163 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:53,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 609 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1598 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-01-18 15:29:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-01-18 15:29:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2305. [2022-01-18 15:29:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 3.1966145833333335) internal successors, (7365), 2304 states have internal predecessors, (7365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 7365 transitions. [2022-01-18 15:29:53,218 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 7365 transitions. Word has length 23 [2022-01-18 15:29:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:53,218 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 7365 transitions. [2022-01-18 15:29:53,218 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) [2022-01-18 15:29:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 7365 transitions. [2022-01-18 15:29:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:53,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:53,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:53,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:53,424 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,SelfDestructingSolverStorable290 [2022-01-18 15:29:53,424 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2032399295, now seen corresponding path program 275 times [2022-01-18 15:29:53,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:53,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307811443] [2022-01-18 15:29:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:53,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:53,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:53,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307811443] [2022-01-18 15:29:53,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307811443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:53,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17848453] [2022-01-18 15:29:53,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:29:53,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:53,570 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) [2022-01-18 15:29:53,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 15:29:53,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:29:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:53,939 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 156 treesize of output 136 [2022-01-18 15:29:54,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:54,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:29:54,191 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 237 treesize of output 199 [2022-01-18 15:29:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:54,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:54,521 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 188 treesize of output 164 [2022-01-18 15:29:54,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:54,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:54,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 148 [2022-01-18 15:29:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17848453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:54,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:54,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:29:54,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127272610] [2022-01-18 15:29:54,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:54,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:29:54,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:29:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:29:54,849 INFO L87 Difference]: Start difference. First operand 2305 states and 7365 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-01-18 15:29:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:56,890 INFO L93 Difference]: Finished difference Result 3245 states and 9960 transitions. [2022-01-18 15:29:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:29:56,890 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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 [2022-01-18 15:29:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:56,894 INFO L225 Difference]: With dead ends: 3245 [2022-01-18 15:29:56,894 INFO L226 Difference]: Without dead ends: 3111 [2022-01-18 15:29:56,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=482, Invalid=3808, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:29:56,895 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 214 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:56,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 843 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1958 Invalid, 0 Unknown, 12 Unchecked, 0.6s Time] [2022-01-18 15:29:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-01-18 15:29:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2322. [2022-01-18 15:29:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.203791469194313) internal successors, (7436), 2321 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 7436 transitions. [2022-01-18 15:29:56,922 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 7436 transitions. Word has length 23 [2022-01-18 15:29:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:56,922 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 7436 transitions. [2022-01-18 15:29:56,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-01-18 15:29:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 7436 transitions. [2022-01-18 15:29:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:29:56,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:56,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:56,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:57,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:57,139 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:29:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash 298583285, now seen corresponding path program 276 times [2022-01-18 15:29:57,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:57,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304536136] [2022-01-18 15:29:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:57,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:57,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304536136] [2022-01-18 15:29:57,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304536136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554771139] [2022-01-18 15:29:57,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:29:57,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:57,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:57,272 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) [2022-01-18 15:29:57,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 15:29:57,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:29:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:29:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:57,765 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 262 treesize of output 230 [2022-01-18 15:29:58,143 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 229 treesize of output 191 [2022-01-18 15:29:58,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:58,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:29:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:58,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:58,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:29:59,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:59,018 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 327 treesize of output 289 [2022-01-18 15:29:59,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 223 [2022-01-18 15:29:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:29:59,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554771139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:59,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:59,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:29:59,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128964207] [2022-01-18 15:29:59,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:29:59,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:29:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:29:59,285 INFO L87 Difference]: Start difference. First operand 2322 states and 7436 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) [2022-01-18 15:30:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:01,533 INFO L93 Difference]: Finished difference Result 3180 states and 9793 transitions. [2022-01-18 15:30:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:30:01,534 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 [2022-01-18 15:30:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:01,538 INFO L225 Difference]: With dead ends: 3180 [2022-01-18 15:30:01,538 INFO L226 Difference]: Without dead ends: 3026 [2022-01-18 15:30:01,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=496, Invalid=3794, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:30:01,539 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 211 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:01,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 652 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1629 Invalid, 0 Unknown, 221 Unchecked, 0.6s Time] [2022-01-18 15:30:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-01-18 15:30:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2339. [2022-01-18 15:30:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.204875962360992) internal successors, (7493), 2338 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7493 transitions. [2022-01-18 15:30:01,565 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7493 transitions. Word has length 23 [2022-01-18 15:30:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:01,566 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 7493 transitions. [2022-01-18 15:30:01,566 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) [2022-01-18 15:30:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7493 transitions. [2022-01-18 15:30:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:01,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:01,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:01,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:01,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-18 15:30:01,773 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 555897297, now seen corresponding path program 277 times [2022-01-18 15:30:01,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:01,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235810226] [2022-01-18 15:30:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:01,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:01,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235810226] [2022-01-18 15:30:01,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235810226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956806596] [2022-01-18 15:30:01,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:01,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:01,908 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) [2022-01-18 15:30:01,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 15:30:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:02,377 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 268 treesize of output 240 [2022-01-18 15:30:02,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:02,662 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 220 treesize of output 190 [2022-01-18 15:30:02,665 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 188 treesize of output 168 [2022-01-18 15:30:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:02,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:02,916 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 159 treesize of output 139 [2022-01-18 15:30:03,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:03,333 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 344 treesize of output 306 [2022-01-18 15:30:03,338 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 272 treesize of output 236 [2022-01-18 15:30:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956806596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:03,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:03,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 15:30:03,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561896040] [2022-01-18 15:30:03,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:03,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:03,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:03,496 INFO L87 Difference]: Start difference. First operand 2339 states and 7493 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) [2022-01-18 15:30:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:04,078 INFO L93 Difference]: Finished difference Result 2837 states and 8894 transitions. [2022-01-18 15:30:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:30:04,079 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 23 [2022-01-18 15:30:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:04,083 INFO L225 Difference]: With dead ends: 2837 [2022-01-18 15:30:04,083 INFO L226 Difference]: Without dead ends: 2804 [2022-01-18 15:30:04,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:30:04,083 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:04,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 372 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1019 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-01-18 15:30:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-01-18 15:30:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2337. [2022-01-18 15:30:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 3.2059075342465753) internal successors, (7489), 2336 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 7489 transitions. [2022-01-18 15:30:04,110 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 7489 transitions. Word has length 23 [2022-01-18 15:30:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:04,110 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 7489 transitions. [2022-01-18 15:30:04,111 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) [2022-01-18 15:30:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 7489 transitions. [2022-01-18 15:30:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:04,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:04,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:04,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:04,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-01-18 15:30:04,318 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1845906179, now seen corresponding path program 278 times [2022-01-18 15:30:04,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:04,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585601859] [2022-01-18 15:30:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:04,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:04,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:04,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585601859] [2022-01-18 15:30:04,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585601859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:04,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207638579] [2022-01-18 15:30:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:04,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:04,429 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) [2022-01-18 15:30:04,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 15:30:04,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:04,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:04,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:04,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:05,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:05,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:30:05,350 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 218 treesize of output 192 [2022-01-18 15:30:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:05,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:05,667 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 241 treesize of output 209 [2022-01-18 15:30:05,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:05,918 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 195 treesize of output 177 [2022-01-18 15:30:05,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:06,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207638579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:06,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:06,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:30:06,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945574738] [2022-01-18 15:30:06,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:06,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:30:06,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:30:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:30:06,110 INFO L87 Difference]: Start difference. First operand 2337 states and 7489 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) [2022-01-18 15:30:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:06,484 INFO L93 Difference]: Finished difference Result 3111 states and 9588 transitions. [2022-01-18 15:30:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:30:06,484 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 [2022-01-18 15:30:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:06,489 INFO L225 Difference]: With dead ends: 3111 [2022-01-18 15:30:06,489 INFO L226 Difference]: Without dead ends: 3002 [2022-01-18 15:30:06,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:30:06,490 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:06,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 343 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 917 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-01-18 15:30:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2022-01-18 15:30:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2387. [2022-01-18 15:30:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.2233864207879295) internal successors, (7691), 2386 states have internal predecessors, (7691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 7691 transitions. [2022-01-18 15:30:06,521 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 7691 transitions. Word has length 23 [2022-01-18 15:30:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:06,522 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 7691 transitions. [2022-01-18 15:30:06,522 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) [2022-01-18 15:30:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 7691 transitions. [2022-01-18 15:30:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:06,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:06,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:06,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 15:30:06,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:06,732 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1431726311, now seen corresponding path program 279 times [2022-01-18 15:30:06,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:06,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146600529] [2022-01-18 15:30:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:06,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:06,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146600529] [2022-01-18 15:30:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146600529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373743772] [2022-01-18 15:30:06,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:06,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:06,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:06,879 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) [2022-01-18 15:30:06,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 15:30:07,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:07,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:07,263 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 156 treesize of output 136 [2022-01-18 15:30:07,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:07,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:07,547 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-01-18 15:30:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:07,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:08,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:08,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:08,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 268 [2022-01-18 15:30:08,415 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 234 treesize of output 194 [2022-01-18 15:30:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:08,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373743772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:08,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:08,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 15:30:08,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106029121] [2022-01-18 15:30:08,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:30:08,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:30:08,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:30:08,619 INFO L87 Difference]: Start difference. First operand 2387 states and 7691 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) [2022-01-18 15:30:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:09,555 INFO L93 Difference]: Finished difference Result 2922 states and 9265 transitions. [2022-01-18 15:30:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:30:09,556 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 [2022-01-18 15:30:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:09,566 INFO L225 Difference]: With dead ends: 2922 [2022-01-18 15:30:09,566 INFO L226 Difference]: Without dead ends: 2881 [2022-01-18 15:30:09,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:30:09,567 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 189 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:09,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 277 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 787 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-01-18 15:30:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2022-01-18 15:30:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2400. [2022-01-18 15:30:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.2346811171321384) internal successors, (7760), 2399 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7760 transitions. [2022-01-18 15:30:09,600 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7760 transitions. Word has length 23 [2022-01-18 15:30:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:09,600 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7760 transitions. [2022-01-18 15:30:09,600 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) [2022-01-18 15:30:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7760 transitions. [2022-01-18 15:30:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:09,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:09,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:09,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:09,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:09,804 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1405358201, now seen corresponding path program 280 times [2022-01-18 15:30:09,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689491819] [2022-01-18 15:30:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:09,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:09,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689491819] [2022-01-18 15:30:09,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689491819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322173156] [2022-01-18 15:30:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:09,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:09,930 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) [2022-01-18 15:30:09,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 15:30:10,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:10,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:10,400 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 216 treesize of output 186 [2022-01-18 15:30:10,754 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 148 treesize of output 128 [2022-01-18 15:30:10,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:10,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:30:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:10,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:11,086 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 241 treesize of output 209 [2022-01-18 15:30:11,336 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 235 treesize of output 207 [2022-01-18 15:30:11,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:11,342 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 218 treesize of output 200 [2022-01-18 15:30:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:11,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322173156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:11,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:11,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 15:30:11,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123562589] [2022-01-18 15:30:11,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:11,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:30:11,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:30:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:30:11,597 INFO L87 Difference]: Start difference. First operand 2400 states and 7760 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) [2022-01-18 15:30:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:14,437 INFO L93 Difference]: Finished difference Result 3868 states and 11796 transitions. [2022-01-18 15:30:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 15:30:14,437 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 [2022-01-18 15:30:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:14,442 INFO L225 Difference]: With dead ends: 3868 [2022-01-18 15:30:14,442 INFO L226 Difference]: Without dead ends: 3645 [2022-01-18 15:30:14,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=606, Invalid=6200, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:30:14,443 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 319 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:14,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1277 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3088 Invalid, 0 Unknown, 308 Unchecked, 1.1s Time] [2022-01-18 15:30:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2022-01-18 15:30:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 2434. [2022-01-18 15:30:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 3.2404438964241677) internal successors, (7884), 2433 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 7884 transitions. [2022-01-18 15:30:14,475 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 7884 transitions. Word has length 23 [2022-01-18 15:30:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:14,475 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 7884 transitions. [2022-01-18 15:30:14,476 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) [2022-01-18 15:30:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 7884 transitions. [2022-01-18 15:30:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:14,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:14,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:14,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 15:30:14,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:14,695 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1130084337, now seen corresponding path program 281 times [2022-01-18 15:30:14,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:14,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937594594] [2022-01-18 15:30:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:14,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:14,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937594594] [2022-01-18 15:30:14,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937594594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843708888] [2022-01-18 15:30:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:14,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:14,820 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) [2022-01-18 15:30:14,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 15:30:15,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:15,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:15,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:15,213 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 136 treesize of output 120 [2022-01-18 15:30:15,453 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 229 treesize of output 195 [2022-01-18 15:30:15,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:15,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 207 treesize of output 177 [2022-01-18 15:30:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:15,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:15,911 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 188 treesize of output 164 [2022-01-18 15:30:16,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:16,284 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 302 treesize of output 264 [2022-01-18 15:30:16,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 204 [2022-01-18 15:30:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:16,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843708888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:16,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:16,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-01-18 15:30:16,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136680059] [2022-01-18 15:30:16,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:16,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:30:16,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:30:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:30:16,440 INFO L87 Difference]: Start difference. First operand 2434 states and 7884 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2022-01-18 15:30:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:17,346 INFO L93 Difference]: Finished difference Result 3303 states and 10481 transitions. [2022-01-18 15:30:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:30:17,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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 [2022-01-18 15:30:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:17,351 INFO L225 Difference]: With dead ends: 3303 [2022-01-18 15:30:17,351 INFO L226 Difference]: Without dead ends: 3166 [2022-01-18 15:30:17,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:30:17,351 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:17,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 447 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1474 Invalid, 0 Unknown, 188 Unchecked, 0.5s Time] [2022-01-18 15:30:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-01-18 15:30:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2554. [2022-01-18 15:30:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 3.2867215041128084) internal successors, (8391), 2553 states have internal predecessors, (8391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 8391 transitions. [2022-01-18 15:30:17,383 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 8391 transitions. Word has length 23 [2022-01-18 15:30:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:17,383 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 8391 transitions. [2022-01-18 15:30:17,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2022-01-18 15:30:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 8391 transitions. [2022-01-18 15:30:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:17,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:17,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:17,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:17,603 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,SelfDestructingSolverStorable297 [2022-01-18 15:30:17,603 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash -542405693, now seen corresponding path program 282 times [2022-01-18 15:30:17,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:17,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375025116] [2022-01-18 15:30:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:17,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:17,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375025116] [2022-01-18 15:30:17,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375025116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354066818] [2022-01-18 15:30:17,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:17,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:17,746 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) [2022-01-18 15:30:17,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 15:30:18,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:18,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:18,201 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 181 treesize of output 157 [2022-01-18 15:30:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:18,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 341 treesize of output 283 [2022-01-18 15:30:18,768 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 257 treesize of output 229 [2022-01-18 15:30:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:18,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:19,121 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 189 treesize of output 173 [2022-01-18 15:30:19,555 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 308 treesize of output 264 [2022-01-18 15:30:19,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:19,562 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 275 treesize of output 245 [2022-01-18 15:30:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:19,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354066818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:19,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:19,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 15:30:19,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448243631] [2022-01-18 15:30:19,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:19,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:30:19,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:30:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:30:19,780 INFO L87 Difference]: Start difference. First operand 2554 states and 8391 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) [2022-01-18 15:30:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:21,457 INFO L93 Difference]: Finished difference Result 3702 states and 11512 transitions. [2022-01-18 15:30:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 15:30:21,457 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 [2022-01-18 15:30:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:21,463 INFO L225 Difference]: With dead ends: 3702 [2022-01-18 15:30:21,463 INFO L226 Difference]: Without dead ends: 3551 [2022-01-18 15:30:21,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=629, Invalid=5377, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:30:21,464 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 403 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:21,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 913 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1901 Invalid, 0 Unknown, 370 Unchecked, 0.5s Time] [2022-01-18 15:30:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2022-01-18 15:30:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2585. [2022-01-18 15:30:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 3.293730650154799) internal successors, (8511), 2584 states have internal predecessors, (8511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 8511 transitions. [2022-01-18 15:30:21,499 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 8511 transitions. Word has length 23 [2022-01-18 15:30:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:21,499 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 8511 transitions. [2022-01-18 15:30:21,499 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) [2022-01-18 15:30:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 8511 transitions. [2022-01-18 15:30:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:21,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:21,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:21,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:21,725 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,SelfDestructingSolverStorable298 [2022-01-18 15:30:21,725 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1043326779, now seen corresponding path program 283 times [2022-01-18 15:30:21,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:21,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510505244] [2022-01-18 15:30:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:21,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:21,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510505244] [2022-01-18 15:30:21,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510505244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376404538] [2022-01-18 15:30:21,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:21,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:21,851 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) [2022-01-18 15:30:21,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 15:30:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:22,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:22,254 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 173 treesize of output 155 [2022-01-18 15:30:22,583 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 128 treesize of output 112 [2022-01-18 15:30:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:22,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:30:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:22,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:22,900 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 171 treesize of output 151 [2022-01-18 15:30:23,247 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 258 treesize of output 222 [2022-01-18 15:30:23,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:23,254 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 233 treesize of output 207 [2022-01-18 15:30:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:23,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376404538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:23,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:23,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 15:30:23,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874729870] [2022-01-18 15:30:23,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:23,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:30:23,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:30:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:30:23,560 INFO L87 Difference]: Start difference. First operand 2585 states and 8511 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) [2022-01-18 15:30:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:25,982 INFO L93 Difference]: Finished difference Result 4069 states and 12590 transitions. [2022-01-18 15:30:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 15:30:25,983 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 [2022-01-18 15:30:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:25,989 INFO L225 Difference]: With dead ends: 4069 [2022-01-18 15:30:25,989 INFO L226 Difference]: Without dead ends: 3872 [2022-01-18 15:30:25,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=713, Invalid=6943, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 15:30:25,990 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 287 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:25,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 984 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2440 Invalid, 0 Unknown, 578 Unchecked, 0.7s Time] [2022-01-18 15:30:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2022-01-18 15:30:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2631. [2022-01-18 15:30:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 3.311787072243346) internal successors, (8710), 2630 states have internal predecessors, (8710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 8710 transitions. [2022-01-18 15:30:26,028 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 8710 transitions. Word has length 23 [2022-01-18 15:30:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:26,028 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 8710 transitions. [2022-01-18 15:30:26,028 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) [2022-01-18 15:30:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 8710 transitions. [2022-01-18 15:30:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:26,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:26,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:26,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:26,240 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,SelfDestructingSolverStorable299 [2022-01-18 15:30:26,240 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -930243113, now seen corresponding path program 284 times [2022-01-18 15:30:26,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:26,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003826959] [2022-01-18 15:30:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:26,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:26,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:26,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003826959] [2022-01-18 15:30:26,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003826959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:26,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274113443] [2022-01-18 15:30:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:26,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:26,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:26,363 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) [2022-01-18 15:30:26,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 15:30:26,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:26,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:30:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:26,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:27,136 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 258 [2022-01-18 15:30:27,140 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 241 treesize of output 209 [2022-01-18 15:30:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:27,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:28,175 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 329 treesize of output 289 [2022-01-18 15:30:28,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:28,593 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 224 [2022-01-18 15:30:28,597 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 209 treesize of output 185 [2022-01-18 15:30:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:28,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274113443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:28,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:28,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 15:30:28,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773492276] [2022-01-18 15:30:28,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:28,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:28,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:28,995 INFO L87 Difference]: Start difference. First operand 2631 states and 8710 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 15:30:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:30,508 INFO L93 Difference]: Finished difference Result 3969 states and 12645 transitions. [2022-01-18 15:30:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:30:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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 [2022-01-18 15:30:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:30,514 INFO L225 Difference]: With dead ends: 3969 [2022-01-18 15:30:30,514 INFO L226 Difference]: Without dead ends: 3731 [2022-01-18 15:30:30,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:30:30,514 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 290 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:30,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 499 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1510 Invalid, 0 Unknown, 106 Unchecked, 0.6s Time] [2022-01-18 15:30:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2022-01-18 15:30:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 2695. [2022-01-18 15:30:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.351893095768374) internal successors, (9030), 2694 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9030 transitions. [2022-01-18 15:30:30,549 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9030 transitions. Word has length 23 [2022-01-18 15:30:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:30,549 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9030 transitions. [2022-01-18 15:30:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 15:30:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9030 transitions. [2022-01-18 15:30:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:30,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:30,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:30,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:30,760 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,SelfDestructingSolverStorable300 [2022-01-18 15:30:30,760 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 123785447, now seen corresponding path program 285 times [2022-01-18 15:30:30,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914952145] [2022-01-18 15:30:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:30,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:30,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914952145] [2022-01-18 15:30:30,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914952145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451097302] [2022-01-18 15:30:30,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:30,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:30,860 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) [2022-01-18 15:30:30,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 15:30:31,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:31,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:31,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:31,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:31,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 270 treesize of output 232 [2022-01-18 15:30:31,843 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 206 treesize of output 174 [2022-01-18 15:30:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:30:32,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:32,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:32,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:32,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 152 [2022-01-18 15:30:32,521 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 143 treesize of output 127 [2022-01-18 15:30:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:30:32,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451097302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:32,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:32,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 15:30:32,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940697950] [2022-01-18 15:30:32,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:32,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:30:32,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:30:32,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:30:32,767 INFO L87 Difference]: Start difference. First operand 2695 states and 9030 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) [2022-01-18 15:30:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:34,904 INFO L93 Difference]: Finished difference Result 3679 states and 11653 transitions. [2022-01-18 15:30:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:30:34,904 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 [2022-01-18 15:30:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:34,910 INFO L225 Difference]: With dead ends: 3679 [2022-01-18 15:30:34,910 INFO L226 Difference]: Without dead ends: 3487 [2022-01-18 15:30:34,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=3966, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:30:34,910 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 273 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:34,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 785 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2215 Invalid, 0 Unknown, 449 Unchecked, 0.8s Time] [2022-01-18 15:30:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-01-18 15:30:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2659. [2022-01-18 15:30:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 3.3209179834462) internal successors, (8827), 2658 states have internal predecessors, (8827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 8827 transitions. [2022-01-18 15:30:34,945 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 8827 transitions. Word has length 23 [2022-01-18 15:30:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:34,945 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 8827 transitions. [2022-01-18 15:30:34,945 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) [2022-01-18 15:30:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 8827 transitions. [2022-01-18 15:30:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:34,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:34,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:34,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:35,165 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,SelfDestructingSolverStorable301 [2022-01-18 15:30:35,165 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash -265273501, now seen corresponding path program 286 times [2022-01-18 15:30:35,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:35,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347548845] [2022-01-18 15:30:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:35,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:35,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347548845] [2022-01-18 15:30:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347548845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781323034] [2022-01-18 15:30:35,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:35,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:35,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:35,325 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) [2022-01-18 15:30:35,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 15:30:35,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:35,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:35,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 228 [2022-01-18 15:30:36,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:36,085 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 153 treesize of output 133 [2022-01-18 15:30:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:36,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:36,571 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 206 treesize of output 186 [2022-01-18 15:30:36,910 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 312 treesize of output 272 [2022-01-18 15:30:36,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:36,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 270 [2022-01-18 15:30:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:37,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781323034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:37,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:37,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-01-18 15:30:37,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417377778] [2022-01-18 15:30:37,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:37,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:37,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:37,125 INFO L87 Difference]: Start difference. First operand 2659 states and 8827 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) [2022-01-18 15:30:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:37,905 INFO L93 Difference]: Finished difference Result 3139 states and 10189 transitions. [2022-01-18 15:30:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:30:37,905 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 [2022-01-18 15:30:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:37,909 INFO L225 Difference]: With dead ends: 3139 [2022-01-18 15:30:37,909 INFO L226 Difference]: Without dead ends: 3102 [2022-01-18 15:30:37,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:30:37,910 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:37,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 411 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1046 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-01-18 15:30:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-01-18 15:30:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2657. [2022-01-18 15:30:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 3.3207831325301207) internal successors, (8820), 2656 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 8820 transitions. [2022-01-18 15:30:37,940 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 8820 transitions. Word has length 23 [2022-01-18 15:30:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:37,940 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 8820 transitions. [2022-01-18 15:30:37,940 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) [2022-01-18 15:30:37,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 8820 transitions. [2022-01-18 15:30:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:37,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:37,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:37,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 15:30:38,155 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,SelfDestructingSolverStorable302 [2022-01-18 15:30:38,155 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1672486125, now seen corresponding path program 287 times [2022-01-18 15:30:38,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:38,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339476207] [2022-01-18 15:30:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:38,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339476207] [2022-01-18 15:30:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339476207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383407154] [2022-01-18 15:30:38,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:38,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:38,377 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) [2022-01-18 15:30:38,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 15:30:38,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:38,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:38,886 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 293 treesize of output 247 [2022-01-18 15:30:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:39,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:30:39,499 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 171 treesize of output 155 [2022-01-18 15:30:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:39,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:39,744 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 189 treesize of output 173 [2022-01-18 15:30:40,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:40,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:40,080 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 262 treesize of output 224 [2022-01-18 15:30:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:40,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383407154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:40,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:40,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-01-18 15:30:40,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896718384] [2022-01-18 15:30:40,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:40,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:30:40,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:30:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:30:40,238 INFO L87 Difference]: Start difference. First operand 2657 states and 8820 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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) [2022-01-18 15:30:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:40,789 INFO L93 Difference]: Finished difference Result 3128 states and 10150 transitions. [2022-01-18 15:30:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:30:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 [2022-01-18 15:30:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:40,794 INFO L225 Difference]: With dead ends: 3128 [2022-01-18 15:30:40,794 INFO L226 Difference]: Without dead ends: 3113 [2022-01-18 15:30:40,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:30:40,795 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 129 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:40,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 463 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1226 Invalid, 0 Unknown, 380 Unchecked, 0.3s Time] [2022-01-18 15:30:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2022-01-18 15:30:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 2652. [2022-01-18 15:30:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.3179932101093925) internal successors, (8796), 2651 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8796 transitions. [2022-01-18 15:30:40,828 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8796 transitions. Word has length 23 [2022-01-18 15:30:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:40,828 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8796 transitions. [2022-01-18 15:30:40,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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) [2022-01-18 15:30:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8796 transitions. [2022-01-18 15:30:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:40,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:40,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:40,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:41,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:41,047 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1210344077, now seen corresponding path program 288 times [2022-01-18 15:30:41,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071280881] [2022-01-18 15:30:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:41,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:41,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:41,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071280881] [2022-01-18 15:30:41,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071280881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:41,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198664281] [2022-01-18 15:30:41,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:41,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:41,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:41,209 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) [2022-01-18 15:30:41,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 15:30:41,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:30:41,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:41,549 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 156 treesize of output 136 [2022-01-18 15:30:41,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:41,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:41,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 199 treesize of output 171 [2022-01-18 15:30:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:41,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:42,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:42,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:42,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:30:42,477 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 194 treesize of output 174 [2022-01-18 15:30:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198664281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:42,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:42,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-01-18 15:30:42,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309992974] [2022-01-18 15:30:42,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:42,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:42,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:42,616 INFO L87 Difference]: Start difference. First operand 2652 states and 8796 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) [2022-01-18 15:30:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:43,084 INFO L93 Difference]: Finished difference Result 3066 states and 9973 transitions. [2022-01-18 15:30:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:30:43,085 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 [2022-01-18 15:30:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:43,089 INFO L225 Difference]: With dead ends: 3066 [2022-01-18 15:30:43,089 INFO L226 Difference]: Without dead ends: 3029 [2022-01-18 15:30:43,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:30:43,089 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:43,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 316 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 828 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-18 15:30:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-01-18 15:30:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2657. [2022-01-18 15:30:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 3.320406626506024) internal successors, (8819), 2656 states have internal predecessors, (8819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 8819 transitions. [2022-01-18 15:30:43,120 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 8819 transitions. Word has length 23 [2022-01-18 15:30:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:43,120 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 8819 transitions. [2022-01-18 15:30:43,120 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) [2022-01-18 15:30:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 8819 transitions. [2022-01-18 15:30:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:43,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:43,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:43,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 15:30:43,339 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,SelfDestructingSolverStorable304 [2022-01-18 15:30:43,340 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2104614365, now seen corresponding path program 289 times [2022-01-18 15:30:43,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196429071] [2022-01-18 15:30:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:43,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:43,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196429071] [2022-01-18 15:30:43,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196429071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207229962] [2022-01-18 15:30:43,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:43,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:43,429 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) [2022-01-18 15:30:43,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 15:30:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:43,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:43,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:43,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:44,534 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 258 treesize of output 230 [2022-01-18 15:30:44,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:44,538 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 229 [2022-01-18 15:30:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:44,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:45,259 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 291 treesize of output 259 [2022-01-18 15:30:45,530 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:45,530 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 15:30:45,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:30:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207229962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:45,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:30:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529690929] [2022-01-18 15:30:45,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:30:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:30:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:30:45,644 INFO L87 Difference]: Start difference. First operand 2657 states and 8819 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) [2022-01-18 15:30:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:47,680 INFO L93 Difference]: Finished difference Result 3591 states and 11823 transitions. [2022-01-18 15:30:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:30:47,681 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 [2022-01-18 15:30:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:47,689 INFO L225 Difference]: With dead ends: 3591 [2022-01-18 15:30:47,689 INFO L226 Difference]: Without dead ends: 3489 [2022-01-18 15:30:47,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=558, Invalid=3998, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:30:47,690 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 296 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:47,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 625 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1205 Invalid, 0 Unknown, 796 Unchecked, 0.4s Time] [2022-01-18 15:30:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-01-18 15:30:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 2694. [2022-01-18 15:30:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 3.3338284441143706) internal successors, (8978), 2693 states have internal predecessors, (8978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 8978 transitions. [2022-01-18 15:30:47,736 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 8978 transitions. Word has length 23 [2022-01-18 15:30:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 2694 states and 8978 transitions. [2022-01-18 15:30:47,737 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) [2022-01-18 15:30:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 8978 transitions. [2022-01-18 15:30:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:47,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:47,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:47,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 15:30:47,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 15:30:47,943 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1403156825, now seen corresponding path program 290 times [2022-01-18 15:30:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:47,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212387660] [2022-01-18 15:30:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:47,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212387660] [2022-01-18 15:30:48,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212387660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197462708] [2022-01-18 15:30:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:48,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:48,040 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) [2022-01-18 15:30:48,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 15:30:48,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:48,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:30:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:48,539 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 294 treesize of output 264 [2022-01-18 15:30:48,905 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 165 treesize of output 141 [2022-01-18 15:30:48,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:48,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 146 [2022-01-18 15:30:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:49,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:49,611 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 188 treesize of output 164 [2022-01-18 15:30:50,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:50,142 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 325 treesize of output 291 [2022-01-18 15:30:50,147 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 274 treesize of output 234 [2022-01-18 15:30:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197462708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:50,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:50,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:30:50,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369460798] [2022-01-18 15:30:50,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:50,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:30:50,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:30:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:30:50,386 INFO L87 Difference]: Start difference. First operand 2694 states and 8978 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) [2022-01-18 15:30:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:51,295 INFO L93 Difference]: Finished difference Result 3418 states and 11014 transitions. [2022-01-18 15:30:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:30:51,296 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 [2022-01-18 15:30:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:51,301 INFO L225 Difference]: With dead ends: 3418 [2022-01-18 15:30:51,301 INFO L226 Difference]: Without dead ends: 3334 [2022-01-18 15:30:51,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:30:51,301 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:51,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 444 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1131 Invalid, 0 Unknown, 211 Unchecked, 0.4s Time] [2022-01-18 15:30:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2022-01-18 15:30:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2696. [2022-01-18 15:30:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 3.3280148423005564) internal successors, (8969), 2695 states have internal predecessors, (8969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 8969 transitions. [2022-01-18 15:30:51,336 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 8969 transitions. Word has length 23 [2022-01-18 15:30:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:51,336 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 8969 transitions. [2022-01-18 15:30:51,336 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) [2022-01-18 15:30:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 8969 transitions. [2022-01-18 15:30:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:51,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:51,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:51,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 15:30:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:51,546 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1655765473, now seen corresponding path program 291 times [2022-01-18 15:30:51,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:51,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127683079] [2022-01-18 15:30:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:51,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:30:51,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127683079] [2022-01-18 15:30:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127683079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868372475] [2022-01-18 15:30:51,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:51,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:51,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:51,696 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) [2022-01-18 15:30:51,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 15:30:52,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:30:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:52,101 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 164 treesize of output 150 [2022-01-18 15:30:52,297 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 145 treesize of output 125 [2022-01-18 15:30:52,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:52,300 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-01-18 15:30:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:30:52,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:52,623 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 159 treesize of output 139 [2022-01-18 15:30:52,852 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 171 treesize of output 151 [2022-01-18 15:30:52,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:52,857 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 183 treesize of output 169 [2022-01-18 15:30:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:30:52,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868372475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:52,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:52,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:30:52,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753959063] [2022-01-18 15:30:52,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:52,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:52,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:52,945 INFO L87 Difference]: Start difference. First operand 2696 states and 8969 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) [2022-01-18 15:30:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:53,469 INFO L93 Difference]: Finished difference Result 3313 states and 10703 transitions. [2022-01-18 15:30:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:30:53,469 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 [2022-01-18 15:30:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:53,474 INFO L225 Difference]: With dead ends: 3313 [2022-01-18 15:30:53,474 INFO L226 Difference]: Without dead ends: 3259 [2022-01-18 15:30:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:30:53,474 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:53,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 321 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 842 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-01-18 15:30:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2022-01-18 15:30:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 2690. [2022-01-18 15:30:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 3.3250278914094458) internal successors, (8941), 2689 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 8941 transitions. [2022-01-18 15:30:53,505 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 8941 transitions. Word has length 23 [2022-01-18 15:30:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:53,505 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 8941 transitions. [2022-01-18 15:30:53,505 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) [2022-01-18 15:30:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 8941 transitions. [2022-01-18 15:30:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:53,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:53,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:53,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:53,725 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,SelfDestructingSolverStorable307 [2022-01-18 15:30:53,725 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1976313859, now seen corresponding path program 292 times [2022-01-18 15:30:53,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362722540] [2022-01-18 15:30:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:53,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:30:53,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362722540] [2022-01-18 15:30:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362722540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758565930] [2022-01-18 15:30:53,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:53,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:53,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:53,823 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) [2022-01-18 15:30:53,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 15:30:54,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:54,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:30:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:54,240 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 209 treesize of output 193 [2022-01-18 15:30:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:54,732 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 317 treesize of output 259 [2022-01-18 15:30:54,736 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 257 treesize of output 229 [2022-01-18 15:30:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:54,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:55,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:55,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:30:55,601 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:55,601 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 172 treesize of output 153 [2022-01-18 15:30:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:55,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758565930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:55,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:55,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:30:55,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386037039] [2022-01-18 15:30:55,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:55,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:55,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:55,699 INFO L87 Difference]: Start difference. First operand 2690 states and 8941 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 15:30:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:56,749 INFO L93 Difference]: Finished difference Result 3419 states and 11055 transitions. [2022-01-18 15:30:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:30:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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 [2022-01-18 15:30:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:56,755 INFO L225 Difference]: With dead ends: 3419 [2022-01-18 15:30:56,755 INFO L226 Difference]: Without dead ends: 3262 [2022-01-18 15:30:56,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:30:56,755 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:56,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 725 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1287 Invalid, 0 Unknown, 302 Unchecked, 0.4s Time] [2022-01-18 15:30:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2022-01-18 15:30:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2716. [2022-01-18 15:30:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 3.3226519337016573) internal successors, (9021), 2715 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 9021 transitions. [2022-01-18 15:30:56,786 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 9021 transitions. Word has length 23 [2022-01-18 15:30:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:56,786 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 9021 transitions. [2022-01-18 15:30:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 15:30:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 9021 transitions. [2022-01-18 15:30:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:56,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:56,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:56,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:56,997 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash -584083717, now seen corresponding path program 293 times [2022-01-18 15:30:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:56,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023949824] [2022-01-18 15:30:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:56,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:57,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023949824] [2022-01-18 15:30:57,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023949824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678287101] [2022-01-18 15:30:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:57,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:57,104 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) [2022-01-18 15:30:57,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 15:30:57,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:57,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:30:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:57,632 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 285 treesize of output 245 [2022-01-18 15:30:58,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:58,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:30:58,012 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 157 treesize of output 139 [2022-01-18 15:30:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:58,321 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 239 treesize of output 203 [2022-01-18 15:30:58,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:58,656 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 203 treesize of output 185 [2022-01-18 15:30:58,660 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 168 treesize of output 148 [2022-01-18 15:30:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:30:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678287101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:58,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:58,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:30:58,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670698164] [2022-01-18 15:30:58,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:58,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:30:58,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:30:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:58,999 INFO L87 Difference]: Start difference. First operand 2716 states and 9021 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-01-18 15:30:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:59,652 INFO L93 Difference]: Finished difference Result 3478 states and 11113 transitions. [2022-01-18 15:30:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:30:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 [2022-01-18 15:30:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:59,657 INFO L225 Difference]: With dead ends: 3478 [2022-01-18 15:30:59,657 INFO L226 Difference]: Without dead ends: 3250 [2022-01-18 15:30:59,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:30:59,658 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:59,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 380 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1017 Invalid, 0 Unknown, 187 Unchecked, 0.4s Time] [2022-01-18 15:30:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2022-01-18 15:30:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2751. [2022-01-18 15:30:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 3.3181818181818183) internal successors, (9125), 2750 states have internal predecessors, (9125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 9125 transitions. [2022-01-18 15:30:59,688 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 9125 transitions. Word has length 23 [2022-01-18 15:30:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:59,688 INFO L470 AbstractCegarLoop]: Abstraction has 2751 states and 9125 transitions. [2022-01-18 15:30:59,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-01-18 15:30:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 9125 transitions. [2022-01-18 15:30:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:30:59,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:59,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:59,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:59,894 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,SelfDestructingSolverStorable309 [2022-01-18 15:30:59,894 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:30:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash 97747823, now seen corresponding path program 294 times [2022-01-18 15:30:59,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394758581] [2022-01-18 15:30:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:59,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:00,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:00,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394758581] [2022-01-18 15:31:00,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394758581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:00,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496483543] [2022-01-18 15:31:00,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:00,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:00,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:00,004 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) [2022-01-18 15:31:00,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 15:31:00,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:31:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:00,408 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 173 treesize of output 155 [2022-01-18 15:31:00,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:00,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:00,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:31:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:01,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:01,801 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 331 treesize of output 287 [2022-01-18 15:31:01,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:01,809 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 300 treesize of output 266 [2022-01-18 15:31:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:02,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496483543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:02,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:31:02,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822615538] [2022-01-18 15:31:02,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:02,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:31:02,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:31:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:31:02,049 INFO L87 Difference]: Start difference. First operand 2751 states and 9125 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) [2022-01-18 15:31:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:02,302 INFO L93 Difference]: Finished difference Result 3038 states and 9865 transitions. [2022-01-18 15:31:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:31:02,302 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 [2022-01-18 15:31:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:02,307 INFO L225 Difference]: With dead ends: 3038 [2022-01-18 15:31:02,307 INFO L226 Difference]: Without dead ends: 3012 [2022-01-18 15:31:02,307 INFO L932 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 [2022-01-18 15:31:02,307 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:02,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 273 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 634 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-18 15:31:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2022-01-18 15:31:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2745. [2022-01-18 15:31:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 3.32033527696793) internal successors, (9111), 2744 states have internal predecessors, (9111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 9111 transitions. [2022-01-18 15:31:02,337 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 9111 transitions. Word has length 23 [2022-01-18 15:31:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:02,337 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 9111 transitions. [2022-01-18 15:31:02,337 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) [2022-01-18 15:31:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 9111 transitions. [2022-01-18 15:31:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:02,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:02,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:02,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:02,557 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,SelfDestructingSolverStorable310 [2022-01-18 15:31:02,557 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -345151317, now seen corresponding path program 295 times [2022-01-18 15:31:02,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434505673] [2022-01-18 15:31:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:02,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:02,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:02,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434505673] [2022-01-18 15:31:02,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434505673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:02,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109755930] [2022-01-18 15:31:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:02,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:02,744 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) [2022-01-18 15:31:02,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 15:31:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:03,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:03,178 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 181 treesize of output 157 [2022-01-18 15:31:03,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:03,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:03,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:31:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:03,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:03,965 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 142 treesize of output 126 [2022-01-18 15:31:04,190 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 206 treesize of output 182 [2022-01-18 15:31:04,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:04,197 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 181 [2022-01-18 15:31:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:04,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109755930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:04,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:04,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:31:04,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416571901] [2022-01-18 15:31:04,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:04,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:31:04,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:31:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:31:04,378 INFO L87 Difference]: Start difference. First operand 2745 states and 9111 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) [2022-01-18 15:31:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:05,576 INFO L93 Difference]: Finished difference Result 3548 states and 11162 transitions. [2022-01-18 15:31:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:31:05,576 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 [2022-01-18 15:31:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:05,581 INFO L225 Difference]: With dead ends: 3548 [2022-01-18 15:31:05,581 INFO L226 Difference]: Without dead ends: 3375 [2022-01-18 15:31:05,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=2577, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:31:05,581 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 220 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:05,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 669 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1494 Invalid, 0 Unknown, 517 Unchecked, 0.4s Time] [2022-01-18 15:31:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-01-18 15:31:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2745. [2022-01-18 15:31:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 3.318513119533528) internal successors, (9106), 2744 states have internal predecessors, (9106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 9106 transitions. [2022-01-18 15:31:05,612 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 9106 transitions. Word has length 23 [2022-01-18 15:31:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:05,612 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 9106 transitions. [2022-01-18 15:31:05,612 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) [2022-01-18 15:31:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 9106 transitions. [2022-01-18 15:31:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:05,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:05,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:05,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:05,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 15:31:05,831 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:05,832 INFO L85 PathProgramCache]: Analyzing trace with hash 354549417, now seen corresponding path program 296 times [2022-01-18 15:31:05,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:05,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945932522] [2022-01-18 15:31:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:05,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:05,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945932522] [2022-01-18 15:31:05,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945932522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428635047] [2022-01-18 15:31:05,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:05,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:05,927 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) [2022-01-18 15:31:05,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 15:31:06,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:31:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:06,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 347 treesize of output 291 [2022-01-18 15:31:06,855 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 165 treesize of output 141 [2022-01-18 15:31:06,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:06,874 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:31:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:07,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:07,257 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 323 treesize of output 291 [2022-01-18 15:31:07,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:07,551 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 203 treesize of output 185 [2022-01-18 15:31:07,555 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 [2022-01-18 15:31:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:07,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428635047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:07,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:07,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:31:07,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464925173] [2022-01-18 15:31:07,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:07,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:31:07,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:07,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:31:07,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:07,701 INFO L87 Difference]: Start difference. First operand 2745 states and 9106 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) [2022-01-18 15:31:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:08,024 INFO L93 Difference]: Finished difference Result 3373 states and 10812 transitions. [2022-01-18 15:31:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:31:08,024 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 23 [2022-01-18 15:31:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:08,029 INFO L225 Difference]: With dead ends: 3373 [2022-01-18 15:31:08,029 INFO L226 Difference]: Without dead ends: 3263 [2022-01-18 15:31:08,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:31:08,029 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:08,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 376 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 726 Invalid, 0 Unknown, 227 Unchecked, 0.2s Time] [2022-01-18 15:31:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-01-18 15:31:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2767. [2022-01-18 15:31:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 3.319233550253073) internal successors, (9181), 2766 states have internal predecessors, (9181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 9181 transitions. [2022-01-18 15:31:08,060 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 9181 transitions. Word has length 23 [2022-01-18 15:31:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:08,060 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 9181 transitions. [2022-01-18 15:31:08,060 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) [2022-01-18 15:31:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 9181 transitions. [2022-01-18 15:31:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:08,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:08,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:08,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:08,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 15:31:08,277 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 388470149, now seen corresponding path program 297 times [2022-01-18 15:31:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175740541] [2022-01-18 15:31:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:08,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:08,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175740541] [2022-01-18 15:31:08,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175740541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023790669] [2022-01-18 15:31:08,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:08,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:08,419 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) [2022-01-18 15:31:08,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 15:31:08,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:31:08,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:31:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:08,867 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 226 treesize of output 206 [2022-01-18 15:31:09,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:09,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:31:09,464 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 151 treesize of output 133 [2022-01-18 15:31:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:09,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:09,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:10,307 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 188 treesize of output 164 [2022-01-18 15:31:10,315 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:10,315 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 172 treesize of output 153 [2022-01-18 15:31:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:10,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023790669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:10,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:10,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:31:10,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434580977] [2022-01-18 15:31:10,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:10,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:31:10,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:31:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:10,514 INFO L87 Difference]: Start difference. First operand 2767 states and 9181 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-01-18 15:31:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:11,770 INFO L93 Difference]: Finished difference Result 3666 states and 11759 transitions. [2022-01-18 15:31:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:31:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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 [2022-01-18 15:31:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:11,776 INFO L225 Difference]: With dead ends: 3666 [2022-01-18 15:31:11,776 INFO L226 Difference]: Without dead ends: 3523 [2022-01-18 15:31:11,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=2993, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:31:11,776 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 175 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:11,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 861 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1562 Invalid, 0 Unknown, 509 Unchecked, 0.4s Time] [2022-01-18 15:31:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2022-01-18 15:31:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2800. [2022-01-18 15:31:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 3.3126116470167917) internal successors, (9272), 2799 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 9272 transitions. [2022-01-18 15:31:11,811 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 9272 transitions. Word has length 23 [2022-01-18 15:31:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:11,811 INFO L470 AbstractCegarLoop]: Abstraction has 2800 states and 9272 transitions. [2022-01-18 15:31:11,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-01-18 15:31:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 9272 transitions. [2022-01-18 15:31:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:11,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:11,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:11,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:12,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:12,027 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1175665425, now seen corresponding path program 298 times [2022-01-18 15:31:12,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252432292] [2022-01-18 15:31:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:12,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:12,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252432292] [2022-01-18 15:31:12,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252432292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598295897] [2022-01-18 15:31:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:12,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:12,214 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) [2022-01-18 15:31:12,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 15:31:12,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:12,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:12,629 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 153 treesize of output 137 [2022-01-18 15:31:13,003 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 200 treesize of output 170 [2022-01-18 15:31:13,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:13,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 211 treesize of output 179 [2022-01-18 15:31:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:13,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:13,643 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 373 treesize of output 337 [2022-01-18 15:31:13,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:13,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:13,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:31:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598295897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:14,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:14,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:31:14,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429743197] [2022-01-18 15:31:14,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:31:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:31:14,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:14,071 INFO L87 Difference]: Start difference. First operand 2800 states and 9272 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:31:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:15,306 INFO L93 Difference]: Finished difference Result 3851 states and 12568 transitions. [2022-01-18 15:31:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:31:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 [2022-01-18 15:31:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:15,312 INFO L225 Difference]: With dead ends: 3851 [2022-01-18 15:31:15,312 INFO L226 Difference]: Without dead ends: 3670 [2022-01-18 15:31:15,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:31:15,312 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 377 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:15,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 368 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 832 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-01-18 15:31:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-01-18 15:31:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2899. [2022-01-18 15:31:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 3.3409247757073843) internal successors, (9682), 2898 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 9682 transitions. [2022-01-18 15:31:15,346 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 9682 transitions. Word has length 23 [2022-01-18 15:31:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:15,346 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 9682 transitions. [2022-01-18 15:31:15,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:31:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 9682 transitions. [2022-01-18 15:31:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:15,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:15,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:15,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 15:31:15,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:15,576 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2043716023, now seen corresponding path program 299 times [2022-01-18 15:31:15,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:15,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866924671] [2022-01-18 15:31:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:15,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:15,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:15,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866924671] [2022-01-18 15:31:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866924671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:15,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541440638] [2022-01-18 15:31:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:15,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:15,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:15,683 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) [2022-01-18 15:31:15,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 15:31:16,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:31:16,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:16,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:16,071 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 156 treesize of output 136 [2022-01-18 15:31:16,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:31:16,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:16,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 165 [2022-01-18 15:31:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:16,733 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 188 treesize of output 164 [2022-01-18 15:31:17,229 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:17,229 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 210 treesize of output 187 [2022-01-18 15:31:17,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-01-18 15:31:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:17,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541440638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:17,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:17,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 15:31:17,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123306105] [2022-01-18 15:31:17,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:17,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:31:17,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:31:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:31:17,375 INFO L87 Difference]: Start difference. First operand 2899 states and 9682 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) [2022-01-18 15:31:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:18,629 INFO L93 Difference]: Finished difference Result 3501 states and 11640 transitions. [2022-01-18 15:31:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:31:18,629 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 [2022-01-18 15:31:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:18,635 INFO L225 Difference]: With dead ends: 3501 [2022-01-18 15:31:18,635 INFO L226 Difference]: Without dead ends: 3413 [2022-01-18 15:31:18,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:31:18,635 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 100 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:18,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 584 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1262 Invalid, 0 Unknown, 184 Unchecked, 0.5s Time] [2022-01-18 15:31:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2022-01-18 15:31:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 2914. [2022-01-18 15:31:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2913 states have (on average 3.348094747682801) internal successors, (9753), 2913 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 9753 transitions. [2022-01-18 15:31:18,670 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 9753 transitions. Word has length 23 [2022-01-18 15:31:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:18,670 INFO L470 AbstractCegarLoop]: Abstraction has 2914 states and 9753 transitions. [2022-01-18 15:31:18,670 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) [2022-01-18 15:31:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 9753 transitions. [2022-01-18 15:31:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:18,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:18,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:18,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:18,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:18,878 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash 106138325, now seen corresponding path program 300 times [2022-01-18 15:31:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:18,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266381932] [2022-01-18 15:31:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:18,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:19,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266381932] [2022-01-18 15:31:19,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266381932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902662639] [2022-01-18 15:31:19,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:19,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:19,027 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) [2022-01-18 15:31:19,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 15:31:19,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:19,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:19,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:19,414 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 136 treesize of output 120 [2022-01-18 15:31:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:19,830 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 314 treesize of output 260 [2022-01-18 15:31:19,834 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 258 treesize of output 226 [2022-01-18 15:31:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:20,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:20,145 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 159 treesize of output 139 [2022-01-18 15:31:20,501 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 171 treesize of output 151 [2022-01-18 15:31:20,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:20,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:31:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:20,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902662639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:20,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:20,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-01-18 15:31:20,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25247969] [2022-01-18 15:31:20,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:20,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:31:20,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:31:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:20,598 INFO L87 Difference]: Start difference. First operand 2914 states and 9753 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) [2022-01-18 15:31:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:23,177 INFO L93 Difference]: Finished difference Result 3685 states and 12255 transitions. [2022-01-18 15:31:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:31:23,178 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 23 [2022-01-18 15:31:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:23,184 INFO L225 Difference]: With dead ends: 3685 [2022-01-18 15:31:23,184 INFO L226 Difference]: Without dead ends: 3619 [2022-01-18 15:31:23,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=496, Invalid=4474, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:31:23,184 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 121 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 866 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1948 Invalid, 0 Unknown, 365 Unchecked, 0.7s Time] [2022-01-18 15:31:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2022-01-18 15:31:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 2916. [2022-01-18 15:31:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 3.349228130360206) internal successors, (9763), 2915 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 9763 transitions. [2022-01-18 15:31:23,217 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 9763 transitions. Word has length 23 [2022-01-18 15:31:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:23,217 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 9763 transitions. [2022-01-18 15:31:23,217 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) [2022-01-18 15:31:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 9763 transitions. [2022-01-18 15:31:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:23,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:23,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:23,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-01-18 15:31:23,434 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash 264722335, now seen corresponding path program 301 times [2022-01-18 15:31:23,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166326147] [2022-01-18 15:31:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:23,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:23,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:23,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166326147] [2022-01-18 15:31:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166326147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:23,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413702894] [2022-01-18 15:31:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:23,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:23,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:23,567 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) [2022-01-18 15:31:23,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 15:31:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:23,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:31:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:23,970 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 153 treesize of output 133 [2022-01-18 15:31:24,414 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 165 treesize of output 141 [2022-01-18 15:31:24,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:24,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:31:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:24,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:24,816 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 197 treesize of output 177 [2022-01-18 15:31:25,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:25,289 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:25,289 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 15:31:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:25,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413702894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:25,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:25,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:31:25,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907032935] [2022-01-18 15:31:25,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:25,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:31:25,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:31:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:31:25,442 INFO L87 Difference]: Start difference. First operand 2916 states and 9763 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) [2022-01-18 15:31:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:25,977 INFO L93 Difference]: Finished difference Result 3585 states and 11853 transitions. [2022-01-18 15:31:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:31:25,978 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 [2022-01-18 15:31:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:25,984 INFO L225 Difference]: With dead ends: 3585 [2022-01-18 15:31:25,984 INFO L226 Difference]: Without dead ends: 3537 [2022-01-18 15:31:25,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:31:25,984 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:25,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 489 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 899 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2022-01-18 15:31:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2022-01-18 15:31:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2916. [2022-01-18 15:31:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 3.349228130360206) internal successors, (9763), 2915 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 9763 transitions. [2022-01-18 15:31:26,022 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 9763 transitions. Word has length 23 [2022-01-18 15:31:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:26,022 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 9763 transitions. [2022-01-18 15:31:26,022 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) [2022-01-18 15:31:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 9763 transitions. [2022-01-18 15:31:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:26,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:26,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:26,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:26,235 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash -954639765, now seen corresponding path program 302 times [2022-01-18 15:31:26,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689249916] [2022-01-18 15:31:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:26,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:26,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689249916] [2022-01-18 15:31:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689249916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050317559] [2022-01-18 15:31:26,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:26,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:26,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:26,426 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) [2022-01-18 15:31:26,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 15:31:26,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:26,851 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 173 treesize of output 155 [2022-01-18 15:31:27,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:27,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:27,499 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 187 [2022-01-18 15:31:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:27,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:28,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:28,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:28,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 179 [2022-01-18 15:31:28,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:28,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050317559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:28,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:28,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 15:31:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716481735] [2022-01-18 15:31:28,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:28,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:31:28,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:31:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:28,507 INFO L87 Difference]: Start difference. First operand 2916 states and 9763 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) [2022-01-18 15:31:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:28,954 INFO L93 Difference]: Finished difference Result 3840 states and 12617 transitions. [2022-01-18 15:31:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:31:28,954 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 23 [2022-01-18 15:31:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:28,959 INFO L225 Difference]: With dead ends: 3840 [2022-01-18 15:31:28,959 INFO L226 Difference]: Without dead ends: 3754 [2022-01-18 15:31:28,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:31:28,959 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:28,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 318 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 701 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-18 15:31:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-01-18 15:31:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2926. [2022-01-18 15:31:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.353162393162393) internal successors, (9808), 2925 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 9808 transitions. [2022-01-18 15:31:28,994 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 9808 transitions. Word has length 23 [2022-01-18 15:31:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:28,994 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 9808 transitions. [2022-01-18 15:31:28,994 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) [2022-01-18 15:31:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 9808 transitions. [2022-01-18 15:31:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:28,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:28,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:29,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:29,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:29,215 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1268495607, now seen corresponding path program 303 times [2022-01-18 15:31:29,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:29,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673171636] [2022-01-18 15:31:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:29,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:29,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673171636] [2022-01-18 15:31:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673171636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004311091] [2022-01-18 15:31:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:29,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:29,379 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) [2022-01-18 15:31:29,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 15:31:29,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:31:29,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:29,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:29,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:30,297 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 148 treesize of output 128 [2022-01-18 15:31:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:30,300 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:31:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:30,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:30,758 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 306 treesize of output 278 [2022-01-18 15:31:31,124 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 247 treesize of output 219 [2022-01-18 15:31:31,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:31,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:31:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:31,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004311091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:31,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:31,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:31:31,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417585059] [2022-01-18 15:31:31,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:31,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:31:31,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:31:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:31,401 INFO L87 Difference]: Start difference. First operand 2926 states and 9808 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) [2022-01-18 15:31:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:34,426 INFO L93 Difference]: Finished difference Result 4301 states and 13529 transitions. [2022-01-18 15:31:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:31:34,426 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 [2022-01-18 15:31:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:34,449 INFO L225 Difference]: With dead ends: 4301 [2022-01-18 15:31:34,449 INFO L226 Difference]: Without dead ends: 3948 [2022-01-18 15:31:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=521, Invalid=4591, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:31:34,450 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 275 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:34,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 994 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2305 Invalid, 0 Unknown, 614 Unchecked, 0.9s Time] [2022-01-18 15:31:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2022-01-18 15:31:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 1988. [2022-01-18 15:31:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.544539506794162) internal successors, (7043), 1987 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7043 transitions. [2022-01-18 15:31:34,479 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7043 transitions. Word has length 23 [2022-01-18 15:31:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:34,479 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 7043 transitions. [2022-01-18 15:31:34,479 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) [2022-01-18 15:31:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7043 transitions. [2022-01-18 15:31:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:34,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:34,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:34,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:34,695 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,SelfDestructingSolverStorable319 [2022-01-18 15:31:34,695 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 798758523, now seen corresponding path program 304 times [2022-01-18 15:31:34,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:34,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854075365] [2022-01-18 15:31:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:34,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:34,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:34,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854075365] [2022-01-18 15:31:34,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854075365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:34,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6416936] [2022-01-18 15:31:34,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:34,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:34,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:34,962 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) [2022-01-18 15:31:34,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 15:31:35,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:35,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:35,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:35,848 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 148 treesize of output 128 [2022-01-18 15:31:35,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:35,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:31:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:36,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:36,290 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 142 treesize of output 126 [2022-01-18 15:31:36,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:36,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 154 [2022-01-18 15:31:36,465 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 143 treesize of output 127 [2022-01-18 15:31:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:36,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6416936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:36,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:36,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:31:36,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976488771] [2022-01-18 15:31:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:36,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:31:36,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:31:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:36,698 INFO L87 Difference]: Start difference. First operand 1988 states and 7043 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) [2022-01-18 15:31:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:37,496 INFO L93 Difference]: Finished difference Result 3304 states and 11105 transitions. [2022-01-18 15:31:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:31:37,496 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 23 [2022-01-18 15:31:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:37,501 INFO L225 Difference]: With dead ends: 3304 [2022-01-18 15:31:37,501 INFO L226 Difference]: Without dead ends: 3152 [2022-01-18 15:31:37,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:31:37,502 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 354 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:37,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 408 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1030 Invalid, 0 Unknown, 419 Unchecked, 0.4s Time] [2022-01-18 15:31:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-01-18 15:31:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 1984. [2022-01-18 15:31:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.5431164901664145) internal successors, (7026), 1983 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7026 transitions. [2022-01-18 15:31:37,530 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7026 transitions. Word has length 23 [2022-01-18 15:31:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:37,531 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 7026 transitions. [2022-01-18 15:31:37,531 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) [2022-01-18 15:31:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7026 transitions. [2022-01-18 15:31:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:37,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:37,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:37,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:37,736 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,SelfDestructingSolverStorable320 [2022-01-18 15:31:37,736 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1998417725, now seen corresponding path program 305 times [2022-01-18 15:31:37,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080594956] [2022-01-18 15:31:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:37,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:37,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:37,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080594956] [2022-01-18 15:31:37,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080594956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:37,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230844064] [2022-01-18 15:31:37,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:37,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:37,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:37,855 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) [2022-01-18 15:31:37,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 15:31:38,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:38,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:38,290 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 173 treesize of output 155 [2022-01-18 15:31:38,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:38,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:31:38,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:38,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:39,054 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 260 treesize of output 220 [2022-01-18 15:31:39,456 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 264 treesize of output 232 [2022-01-18 15:31:39,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:39,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 213 [2022-01-18 15:31:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:39,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230844064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:39,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:39,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:31:39,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537228133] [2022-01-18 15:31:39,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:39,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:31:39,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:31:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:39,684 INFO L87 Difference]: Start difference. First operand 1984 states and 7026 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) [2022-01-18 15:31:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:43,417 INFO L93 Difference]: Finished difference Result 3368 states and 10885 transitions. [2022-01-18 15:31:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:31:43,418 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 [2022-01-18 15:31:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:43,423 INFO L225 Difference]: With dead ends: 3368 [2022-01-18 15:31:43,423 INFO L226 Difference]: Without dead ends: 3175 [2022-01-18 15:31:43,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=746, Invalid=7086, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 15:31:43,424 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 393 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:43,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 968 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2560 Invalid, 0 Unknown, 973 Unchecked, 0.9s Time] [2022-01-18 15:31:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2022-01-18 15:31:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 1948. [2022-01-18 15:31:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.5382639958911146) internal successors, (6889), 1947 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6889 transitions. [2022-01-18 15:31:43,451 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6889 transitions. Word has length 23 [2022-01-18 15:31:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:43,451 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 6889 transitions. [2022-01-18 15:31:43,451 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) [2022-01-18 15:31:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6889 transitions. [2022-01-18 15:31:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:43,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:43,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:43,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:43,661 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,SelfDestructingSolverStorable321 [2022-01-18 15:31:43,661 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1257025455, now seen corresponding path program 306 times [2022-01-18 15:31:43,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:43,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441401845] [2022-01-18 15:31:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:43,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:43,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441401845] [2022-01-18 15:31:43,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441401845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171513409] [2022-01-18 15:31:43,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:43,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:43,799 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) [2022-01-18 15:31:43,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 15:31:44,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:44,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:44,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:44,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:44,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:44,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:44,598 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 134 [2022-01-18 15:31:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:44,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:45,134 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 171 treesize of output 151 [2022-01-18 15:31:45,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:45,349 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 195 treesize of output 177 [2022-01-18 15:31:45,353 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 168 treesize of output 148 [2022-01-18 15:31:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171513409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:45,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:45,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:31:45,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282152806] [2022-01-18 15:31:45,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:45,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:31:45,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:31:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:45,608 INFO L87 Difference]: Start difference. First operand 1948 states and 6889 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:31:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:46,784 INFO L93 Difference]: Finished difference Result 3220 states and 10762 transitions. [2022-01-18 15:31:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:31:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 [2022-01-18 15:31:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:46,789 INFO L225 Difference]: With dead ends: 3220 [2022-01-18 15:31:46,789 INFO L226 Difference]: Without dead ends: 2999 [2022-01-18 15:31:46,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:31:46,789 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 283 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:46,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 346 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 926 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-01-18 15:31:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-01-18 15:31:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2030. [2022-01-18 15:31:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 3.5687530803351404) internal successors, (7241), 2029 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 7241 transitions. [2022-01-18 15:31:46,818 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 7241 transitions. Word has length 23 [2022-01-18 15:31:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:46,818 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 7241 transitions. [2022-01-18 15:31:46,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:31:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 7241 transitions. [2022-01-18 15:31:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:46,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:46,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:46,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:47,037 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,SelfDestructingSolverStorable322 [2022-01-18 15:31:47,037 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1537446503, now seen corresponding path program 307 times [2022-01-18 15:31:47,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:47,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239045847] [2022-01-18 15:31:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:47,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:47,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239045847] [2022-01-18 15:31:47,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239045847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38877379] [2022-01-18 15:31:47,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:47,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:47,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:47,172 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) [2022-01-18 15:31:47,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 15:31:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:47,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 223 [2022-01-18 15:31:48,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:48,088 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-01-18 15:31:48,091 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 157 treesize of output 139 [2022-01-18 15:31:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:48,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:48,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:48,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:48,786 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:48,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 184 [2022-01-18 15:31:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38877379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:48,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:31:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708617108] [2022-01-18 15:31:48,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:31:48,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:31:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:31:48,899 INFO L87 Difference]: Start difference. First operand 2030 states and 7241 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) [2022-01-18 15:31:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:49,682 INFO L93 Difference]: Finished difference Result 2890 states and 9880 transitions. [2022-01-18 15:31:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:31:49,683 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 [2022-01-18 15:31:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:49,687 INFO L225 Difference]: With dead ends: 2890 [2022-01-18 15:31:49,687 INFO L226 Difference]: Without dead ends: 2787 [2022-01-18 15:31:49,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:31:49,687 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 136 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:49,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 737 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1179 Invalid, 0 Unknown, 626 Unchecked, 0.3s Time] [2022-01-18 15:31:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2022-01-18 15:31:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2074. [2022-01-18 15:31:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.5547515677761696) internal successors, (7369), 2073 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 7369 transitions. [2022-01-18 15:31:49,712 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 7369 transitions. Word has length 23 [2022-01-18 15:31:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:49,712 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 7369 transitions. [2022-01-18 15:31:49,712 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) [2022-01-18 15:31:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 7369 transitions. [2022-01-18 15:31:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:49,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:49,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:49,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:49,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 15:31:49,932 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 217407599, now seen corresponding path program 308 times [2022-01-18 15:31:49,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609275760] [2022-01-18 15:31:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:49,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:50,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:50,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609275760] [2022-01-18 15:31:50,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609275760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:50,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690679792] [2022-01-18 15:31:50,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:50,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:50,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:50,015 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) [2022-01-18 15:31:50,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 15:31:50,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:50,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:31:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:50,427 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 165 treesize of output 141 [2022-01-18 15:31:50,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:50,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:50,628 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 191 [2022-01-18 15:31:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:50,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:51,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:51,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:51,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 192 [2022-01-18 15:31:51,667 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 177 treesize of output 157 [2022-01-18 15:31:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:51,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690679792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:51,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:51,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:31:51,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158020495] [2022-01-18 15:31:51,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:51,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:31:51,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:31:51,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:31:51,971 INFO L87 Difference]: Start difference. First operand 2074 states and 7369 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) [2022-01-18 15:31:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:53,318 INFO L93 Difference]: Finished difference Result 3669 states and 11876 transitions. [2022-01-18 15:31:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:31:53,318 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 [2022-01-18 15:31:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:53,324 INFO L225 Difference]: With dead ends: 3669 [2022-01-18 15:31:53,324 INFO L226 Difference]: Without dead ends: 3543 [2022-01-18 15:31:53,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:31:53,324 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 309 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:53,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 474 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:31:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-01-18 15:31:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2063. [2022-01-18 15:31:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.5470417070805045) internal successors, (7314), 2062 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7314 transitions. [2022-01-18 15:31:53,356 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7314 transitions. Word has length 23 [2022-01-18 15:31:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:53,356 INFO L470 AbstractCegarLoop]: Abstraction has 2063 states and 7314 transitions. [2022-01-18 15:31:53,356 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) [2022-01-18 15:31:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7314 transitions. [2022-01-18 15:31:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:53,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:53,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:53,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-18 15:31:53,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:53,573 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1919523695, now seen corresponding path program 309 times [2022-01-18 15:31:53,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:53,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145761908] [2022-01-18 15:31:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:53,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:53,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145761908] [2022-01-18 15:31:53,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145761908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973675279] [2022-01-18 15:31:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:53,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:53,744 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) [2022-01-18 15:31:53,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 15:31:54,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:31:54,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:54,185 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 160 treesize of output 146 [2022-01-18 15:31:54,428 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 181 treesize of output 157 [2022-01-18 15:31:54,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:54,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 149 [2022-01-18 15:31:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:54,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:54,799 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 188 treesize of output 168 [2022-01-18 15:31:55,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:55,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 223 [2022-01-18 15:31:55,100 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 194 treesize of output 174 [2022-01-18 15:31:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:31:55,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973675279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:55,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:55,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:31:55,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111536691] [2022-01-18 15:31:55,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:55,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:31:55,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:31:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:31:55,248 INFO L87 Difference]: Start difference. First operand 2063 states and 7314 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) [2022-01-18 15:31:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:56,127 INFO L93 Difference]: Finished difference Result 2790 states and 9567 transitions. [2022-01-18 15:31:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:31:56,128 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 [2022-01-18 15:31:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:56,132 INFO L225 Difference]: With dead ends: 2790 [2022-01-18 15:31:56,132 INFO L226 Difference]: Without dead ends: 2675 [2022-01-18 15:31:56,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:31:56,132 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 177 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:56,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 460 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:31:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-01-18 15:31:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2135. [2022-01-18 15:31:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.5463917525773194) internal successors, (7568), 2134 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7568 transitions. [2022-01-18 15:31:56,158 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7568 transitions. Word has length 23 [2022-01-18 15:31:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 7568 transitions. [2022-01-18 15:31:56,159 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) [2022-01-18 15:31:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7568 transitions. [2022-01-18 15:31:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:56,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:56,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:56,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:56,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:56,376 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:31:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash -926267853, now seen corresponding path program 310 times [2022-01-18 15:31:56,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:56,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993352989] [2022-01-18 15:31:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:56,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:56,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993352989] [2022-01-18 15:31:56,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993352989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117384095] [2022-01-18 15:31:56,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:56,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:56,571 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) [2022-01-18 15:31:56,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 15:31:56,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:57,018 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 156 treesize of output 136 [2022-01-18 15:31:57,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:57,275 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 283 treesize of output 237 [2022-01-18 15:31:57,279 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 235 treesize of output 203 [2022-01-18 15:31:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:57,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:57,679 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 188 treesize of output 164 [2022-01-18 15:31:58,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:58,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 344 treesize of output 302 [2022-01-18 15:31:58,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:31:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117384095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:58,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:58,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:31:58,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547023396] [2022-01-18 15:31:58,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:58,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:31:58,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:31:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:58,222 INFO L87 Difference]: Start difference. First operand 2135 states and 7568 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:31:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:59,764 INFO L93 Difference]: Finished difference Result 2963 states and 10153 transitions. [2022-01-18 15:31:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:31:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 [2022-01-18 15:31:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:59,768 INFO L225 Difference]: With dead ends: 2963 [2022-01-18 15:31:59,768 INFO L226 Difference]: Without dead ends: 2779 [2022-01-18 15:31:59,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=2967, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:31:59,769 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:59,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 601 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1750 Invalid, 0 Unknown, 216 Unchecked, 0.6s Time] [2022-01-18 15:31:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-01-18 15:31:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2227. [2022-01-18 15:31:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.577268643306379) internal successors, (7963), 2226 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 7963 transitions. [2022-01-18 15:31:59,796 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 7963 transitions. Word has length 23 [2022-01-18 15:31:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:59,796 INFO L470 AbstractCegarLoop]: Abstraction has 2227 states and 7963 transitions. [2022-01-18 15:31:59,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:31:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 7963 transitions. [2022-01-18 15:31:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:31:59,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:59,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:59,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:00,008 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,SelfDestructingSolverStorable326 [2022-01-18 15:32:00,009 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1431121745, now seen corresponding path program 311 times [2022-01-18 15:32:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:00,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082844011] [2022-01-18 15:32:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:00,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:00,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082844011] [2022-01-18 15:32:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082844011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357585252] [2022-01-18 15:32:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:00,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:00,165 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) [2022-01-18 15:32:00,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 15:32:00,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:00,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:00,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:00,612 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 156 treesize of output 136 [2022-01-18 15:32:00,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:00,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 278 treesize of output 238 [2022-01-18 15:32:00,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:01,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:01,395 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 235 treesize of output 211 [2022-01-18 15:32:01,793 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 241 treesize of output 209 [2022-01-18 15:32:01,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:01,800 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 241 treesize of output 215 [2022-01-18 15:32:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:02,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357585252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:02,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:02,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:32:02,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144012079] [2022-01-18 15:32:02,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:02,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:32:02,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:32:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:32:02,045 INFO L87 Difference]: Start difference. First operand 2227 states and 7963 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:32:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:06,348 INFO L93 Difference]: Finished difference Result 3518 states and 11670 transitions. [2022-01-18 15:32:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 15:32:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 [2022-01-18 15:32:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:06,354 INFO L225 Difference]: With dead ends: 3518 [2022-01-18 15:32:06,354 INFO L226 Difference]: Without dead ends: 3356 [2022-01-18 15:32:06,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=831, Invalid=8099, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:32:06,355 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 249 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:06,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1243 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3048 Invalid, 0 Unknown, 244 Unchecked, 1.1s Time] [2022-01-18 15:32:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-01-18 15:32:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2240. [2022-01-18 15:32:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 3.5788298347476553) internal successors, (8013), 2239 states have internal predecessors, (8013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 8013 transitions. [2022-01-18 15:32:06,387 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 8013 transitions. Word has length 23 [2022-01-18 15:32:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:06,387 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 8013 transitions. [2022-01-18 15:32:06,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:32:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 8013 transitions. [2022-01-18 15:32:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:06,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:06,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:06,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 15:32:06,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:06,593 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash -302694265, now seen corresponding path program 312 times [2022-01-18 15:32:06,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:06,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137217469] [2022-01-18 15:32:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:06,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:06,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137217469] [2022-01-18 15:32:06,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137217469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669371591] [2022-01-18 15:32:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:06,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:06,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:06,805 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) [2022-01-18 15:32:06,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 15:32:07,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:07,214 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 136 treesize of output 120 [2022-01-18 15:32:07,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:07,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:07,466 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 15:32:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:07,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:07,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:08,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:08,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:08,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:32:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:08,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669371591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:08,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:08,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:32:08,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099107023] [2022-01-18 15:32:08,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:08,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:32:08,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:08,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:32:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:32:08,404 INFO L87 Difference]: Start difference. First operand 2240 states and 8013 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:32:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:11,651 INFO L93 Difference]: Finished difference Result 3406 states and 11459 transitions. [2022-01-18 15:32:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 15:32:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 [2022-01-18 15:32:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:11,657 INFO L225 Difference]: With dead ends: 3406 [2022-01-18 15:32:11,657 INFO L226 Difference]: Without dead ends: 3215 [2022-01-18 15:32:11,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2863 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=949, Invalid=8557, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 15:32:11,658 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 239 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:11,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 886 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2155 Invalid, 0 Unknown, 259 Unchecked, 0.7s Time] [2022-01-18 15:32:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-01-18 15:32:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2280. [2022-01-18 15:32:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 3.5849056603773586) internal successors, (8170), 2279 states have internal predecessors, (8170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8170 transitions. [2022-01-18 15:32:11,691 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8170 transitions. Word has length 23 [2022-01-18 15:32:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:11,691 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 8170 transitions. [2022-01-18 15:32:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:32:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8170 transitions. [2022-01-18 15:32:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:11,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:11,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:11,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:11,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:11,896 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash 532727057, now seen corresponding path program 313 times [2022-01-18 15:32:11,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:11,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207189100] [2022-01-18 15:32:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:11,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:12,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207189100] [2022-01-18 15:32:12,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207189100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552403718] [2022-01-18 15:32:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:12,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:12,015 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) [2022-01-18 15:32:12,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 15:32:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:12,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:12,470 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 259 treesize of output 229 [2022-01-18 15:32:12,707 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 145 treesize of output 125 [2022-01-18 15:32:12,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:12,710 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 137 treesize of output 119 [2022-01-18 15:32:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:12,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:12,984 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 197 treesize of output 177 [2022-01-18 15:32:13,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:32:13,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:13,264 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 181 treesize of output 167 [2022-01-18 15:32:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:13,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552403718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:13,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:13,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 15:32:13,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048238968] [2022-01-18 15:32:13,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:13,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:32:13,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:32:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:13,443 INFO L87 Difference]: Start difference. First operand 2280 states and 8170 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:32:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:15,404 INFO L93 Difference]: Finished difference Result 3082 states and 10497 transitions. [2022-01-18 15:32:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:32:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 [2022-01-18 15:32:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:15,408 INFO L225 Difference]: With dead ends: 3082 [2022-01-18 15:32:15,408 INFO L226 Difference]: Without dead ends: 2946 [2022-01-18 15:32:15,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=4332, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:32:15,409 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 286 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:15,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 767 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2087 Invalid, 0 Unknown, 44 Unchecked, 0.7s Time] [2022-01-18 15:32:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-01-18 15:32:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2287. [2022-01-18 15:32:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 3.5861767279090113) internal successors, (8198), 2286 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 8198 transitions. [2022-01-18 15:32:15,438 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 8198 transitions. Word has length 23 [2022-01-18 15:32:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:15,438 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 8198 transitions. [2022-01-18 15:32:15,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:32:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 8198 transitions. [2022-01-18 15:32:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:15,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:15,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:15,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:15,660 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,SelfDestructingSolverStorable329 [2022-01-18 15:32:15,660 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 804168529, now seen corresponding path program 314 times [2022-01-18 15:32:15,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:15,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249677984] [2022-01-18 15:32:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:15,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249677984] [2022-01-18 15:32:15,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249677984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488672488] [2022-01-18 15:32:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:15,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:15,796 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) [2022-01-18 15:32:15,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 15:32:16,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:16,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:16,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:16,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 234 treesize of output 204 [2022-01-18 15:32:16,549 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 202 treesize of output 182 [2022-01-18 15:32:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:16,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:17,064 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 188 treesize of output 164 [2022-01-18 15:32:17,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:17,542 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 338 treesize of output 300 [2022-01-18 15:32:17,547 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 268 treesize of output 232 [2022-01-18 15:32:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488672488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:17,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:17,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-01-18 15:32:17,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879718894] [2022-01-18 15:32:17,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:17,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:32:17,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:32:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:17,838 INFO L87 Difference]: Start difference. First operand 2287 states and 8198 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) [2022-01-18 15:32:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:19,076 INFO L93 Difference]: Finished difference Result 2822 states and 9828 transitions. [2022-01-18 15:32:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:32:19,076 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 23 [2022-01-18 15:32:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:19,081 INFO L225 Difference]: With dead ends: 2822 [2022-01-18 15:32:19,082 INFO L226 Difference]: Without dead ends: 2807 [2022-01-18 15:32:19,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:32:19,082 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:19,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 457 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1327 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2022-01-18 15:32:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2022-01-18 15:32:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2287. [2022-01-18 15:32:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 3.5861767279090113) internal successors, (8198), 2286 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 8198 transitions. [2022-01-18 15:32:19,111 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 8198 transitions. Word has length 23 [2022-01-18 15:32:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:19,111 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 8198 transitions. [2022-01-18 15:32:19,111 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) [2022-01-18 15:32:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 8198 transitions. [2022-01-18 15:32:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:19,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:19,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:19,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:19,331 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1597634947, now seen corresponding path program 315 times [2022-01-18 15:32:19,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:19,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142961225] [2022-01-18 15:32:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:19,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:19,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142961225] [2022-01-18 15:32:19,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142961225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686017589] [2022-01-18 15:32:19,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:19,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:19,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:19,446 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) [2022-01-18 15:32:19,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 15:32:19,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:19,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:20,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 155 [2022-01-18 15:32:20,052 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 153 treesize of output 135 [2022-01-18 15:32:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:20,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:20,690 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 258 treesize of output 226 [2022-01-18 15:32:21,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:21,106 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 295 [2022-01-18 15:32:21,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 232 [2022-01-18 15:32:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:21,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686017589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:21,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:21,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:32:21,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125283052] [2022-01-18 15:32:21,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:21,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:32:21,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:21,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:32:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:32:21,305 INFO L87 Difference]: Start difference. First operand 2287 states and 8198 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) [2022-01-18 15:32:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:21,954 INFO L93 Difference]: Finished difference Result 3216 states and 11025 transitions. [2022-01-18 15:32:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:32:21,954 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 [2022-01-18 15:32:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:21,960 INFO L225 Difference]: With dead ends: 3216 [2022-01-18 15:32:21,960 INFO L226 Difference]: Without dead ends: 3074 [2022-01-18 15:32:21,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:32:21,961 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 180 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:21,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 385 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:32:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2022-01-18 15:32:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2303. [2022-01-18 15:32:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 3.6112076455256297) internal successors, (8313), 2302 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 8313 transitions. [2022-01-18 15:32:21,992 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 8313 transitions. Word has length 23 [2022-01-18 15:32:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 8313 transitions. [2022-01-18 15:32:21,992 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) [2022-01-18 15:32:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 8313 transitions. [2022-01-18 15:32:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:21,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:21,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:22,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-18 15:32:22,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:22,212 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash 629040213, now seen corresponding path program 316 times [2022-01-18 15:32:22,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549171475] [2022-01-18 15:32:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:22,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:22,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:22,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549171475] [2022-01-18 15:32:22,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549171475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:22,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264056859] [2022-01-18 15:32:22,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:22,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:22,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:22,348 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) [2022-01-18 15:32:22,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 15:32:22,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:22,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:22,828 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 183 treesize of output 159 [2022-01-18 15:32:23,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:23,258 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:32:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:23,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:23,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 220 [2022-01-18 15:32:23,920 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 233 treesize of output 205 [2022-01-18 15:32:23,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:23,927 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 216 treesize of output 198 [2022-01-18 15:32:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:24,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264056859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:24,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:24,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:32:24,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284403284] [2022-01-18 15:32:24,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:24,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:32:24,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:32:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:32:24,271 INFO L87 Difference]: Start difference. First operand 2303 states and 8313 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) [2022-01-18 15:32:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:24,918 INFO L93 Difference]: Finished difference Result 2989 states and 10214 transitions. [2022-01-18 15:32:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:32:24,918 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 [2022-01-18 15:32:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:24,922 INFO L225 Difference]: With dead ends: 2989 [2022-01-18 15:32:24,922 INFO L226 Difference]: Without dead ends: 2831 [2022-01-18 15:32:24,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:32:24,922 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 191 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:24,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 389 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1033 Invalid, 0 Unknown, 293 Unchecked, 0.4s Time] [2022-01-18 15:32:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-01-18 15:32:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2298. [2022-01-18 15:32:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 3.60557248585111) internal successors, (8282), 2297 states have internal predecessors, (8282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 8282 transitions. [2022-01-18 15:32:24,951 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 8282 transitions. Word has length 23 [2022-01-18 15:32:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:24,951 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 8282 transitions. [2022-01-18 15:32:24,951 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) [2022-01-18 15:32:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 8282 transitions. [2022-01-18 15:32:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:24,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:24,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:24,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:25,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:25,171 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1771281951, now seen corresponding path program 317 times [2022-01-18 15:32:25,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:25,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621198395] [2022-01-18 15:32:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:25,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:25,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:25,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621198395] [2022-01-18 15:32:25,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621198395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:25,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535029791] [2022-01-18 15:32:25,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:25,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:25,355 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) [2022-01-18 15:32:25,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 15:32:25,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:32:25,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:26,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:26,080 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 143 [2022-01-18 15:32:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:26,747 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2022-01-18 15:32:26,749 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 71 treesize of output 59 [2022-01-18 15:32:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:26,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:27,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:27,350 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 244 [2022-01-18 15:32:27,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:27,817 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 254 treesize of output 232 [2022-01-18 15:32:27,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:27,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 200 [2022-01-18 15:32:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535029791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:28,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:28,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2022-01-18 15:32:28,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557401128] [2022-01-18 15:32:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:32:28,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:32:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:32:28,246 INFO L87 Difference]: Start difference. First operand 2298 states and 8282 transitions. Second operand has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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) [2022-01-18 15:32:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:30,894 INFO L93 Difference]: Finished difference Result 2796 states and 9703 transitions. [2022-01-18 15:32:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:32:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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 [2022-01-18 15:32:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:30,899 INFO L225 Difference]: With dead ends: 2796 [2022-01-18 15:32:30,899 INFO L226 Difference]: Without dead ends: 2737 [2022-01-18 15:32:30,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=579, Invalid=4677, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 15:32:30,900 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 171 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:30,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 765 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2233 Invalid, 0 Unknown, 299 Unchecked, 0.8s Time] [2022-01-18 15:32:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2022-01-18 15:32:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2304. [2022-01-18 15:32:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 3.6061658706035606) internal successors, (8305), 2303 states have internal predecessors, (8305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 8305 transitions. [2022-01-18 15:32:30,927 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 8305 transitions. Word has length 23 [2022-01-18 15:32:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:30,927 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 8305 transitions. [2022-01-18 15:32:30,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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) [2022-01-18 15:32:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 8305 transitions. [2022-01-18 15:32:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:30,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:30,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:30,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:31,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-01-18 15:32:31,147 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1491034655, now seen corresponding path program 318 times [2022-01-18 15:32:31,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:31,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888923045] [2022-01-18 15:32:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:31,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:31,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:31,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888923045] [2022-01-18 15:32:31,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888923045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:31,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925504233] [2022-01-18 15:32:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:31,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:31,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:31,292 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) [2022-01-18 15:32:31,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 15:32:31,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:31,783 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 187 treesize of output 171 [2022-01-18 15:32:32,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:32,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 188 [2022-01-18 15:32:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:32,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:32,620 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 206 treesize of output 182 [2022-01-18 15:32:32,913 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 222 treesize of output 190 [2022-01-18 15:32:32,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:32,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 199 [2022-01-18 15:32:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:33,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925504233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:33,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:33,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:32:33,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129659635] [2022-01-18 15:32:33,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:33,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:32:33,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:32:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:32:33,087 INFO L87 Difference]: Start difference. First operand 2304 states and 8305 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) [2022-01-18 15:32:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:33,663 INFO L93 Difference]: Finished difference Result 3144 states and 10906 transitions. [2022-01-18 15:32:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:32:33,663 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 [2022-01-18 15:32:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:33,668 INFO L225 Difference]: With dead ends: 3144 [2022-01-18 15:32:33,668 INFO L226 Difference]: Without dead ends: 2974 [2022-01-18 15:32:33,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:32:33,668 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 260 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:33,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 272 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:32:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-01-18 15:32:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2396. [2022-01-18 15:32:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 3.6488517745302715) internal successors, (8739), 2395 states have internal predecessors, (8739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 8739 transitions. [2022-01-18 15:32:33,699 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 8739 transitions. Word has length 23 [2022-01-18 15:32:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:33,700 INFO L470 AbstractCegarLoop]: Abstraction has 2396 states and 8739 transitions. [2022-01-18 15:32:33,700 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) [2022-01-18 15:32:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 8739 transitions. [2022-01-18 15:32:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:33,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:33,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:33,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:33,904 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,SelfDestructingSolverStorable334 [2022-01-18 15:32:33,905 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash -586317947, now seen corresponding path program 319 times [2022-01-18 15:32:33,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:33,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575418904] [2022-01-18 15:32:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:33,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:33,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575418904] [2022-01-18 15:32:33,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575418904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534594214] [2022-01-18 15:32:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:33,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:33,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:33,992 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) [2022-01-18 15:32:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 15:32:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:34,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:34,799 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 128 treesize of output 112 [2022-01-18 15:32:34,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:34,802 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 15:32:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:34,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:35,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:35,491 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 231 treesize of output 203 [2022-01-18 15:32:35,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:35,498 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 216 treesize of output 198 [2022-01-18 15:32:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:35,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534594214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:35,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:35,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:32:35,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403086103] [2022-01-18 15:32:35,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:35,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:32:35,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:32:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:35,704 INFO L87 Difference]: Start difference. First operand 2396 states and 8739 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) [2022-01-18 15:32:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:38,418 INFO L93 Difference]: Finished difference Result 3806 states and 12921 transitions. [2022-01-18 15:32:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:32:38,419 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 [2022-01-18 15:32:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:38,425 INFO L225 Difference]: With dead ends: 3806 [2022-01-18 15:32:38,425 INFO L226 Difference]: Without dead ends: 3583 [2022-01-18 15:32:38,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=543, Invalid=6263, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:32:38,425 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 257 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:38,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 752 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2093 Invalid, 0 Unknown, 249 Unchecked, 0.8s Time] [2022-01-18 15:32:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2022-01-18 15:32:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2451. [2022-01-18 15:32:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2450 states have (on average 3.666122448979592) internal successors, (8982), 2450 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 8982 transitions. [2022-01-18 15:32:38,461 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 8982 transitions. Word has length 23 [2022-01-18 15:32:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:38,461 INFO L470 AbstractCegarLoop]: Abstraction has 2451 states and 8982 transitions. [2022-01-18 15:32:38,461 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) [2022-01-18 15:32:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 8982 transitions. [2022-01-18 15:32:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:38,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:38,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:38,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:38,679 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,SelfDestructingSolverStorable335 [2022-01-18 15:32:38,679 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2127822053, now seen corresponding path program 320 times [2022-01-18 15:32:38,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:38,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588625059] [2022-01-18 15:32:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:38,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:38,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588625059] [2022-01-18 15:32:38,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588625059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996788574] [2022-01-18 15:32:38,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:38,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:38,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:38,806 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) [2022-01-18 15:32:38,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 15:32:39,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:39,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:39,375 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 284 treesize of output 240 [2022-01-18 15:32:39,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:39,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:39,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:32:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:40,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:40,290 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 171 treesize of output 151 [2022-01-18 15:32:40,796 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 329 treesize of output 285 [2022-01-18 15:32:40,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:40,803 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 298 treesize of output 264 [2022-01-18 15:32:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:41,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996788574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:41,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:41,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:32:41,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222143142] [2022-01-18 15:32:41,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:41,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:32:41,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:32:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:41,016 INFO L87 Difference]: Start difference. First operand 2451 states and 8982 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) [2022-01-18 15:32:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:43,185 INFO L93 Difference]: Finished difference Result 3656 states and 12501 transitions. [2022-01-18 15:32:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:32:43,185 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 [2022-01-18 15:32:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:43,192 INFO L225 Difference]: With dead ends: 3656 [2022-01-18 15:32:43,192 INFO L226 Difference]: Without dead ends: 3496 [2022-01-18 15:32:43,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=513, Invalid=5807, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:32:43,193 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 252 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:43,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 952 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2553 Invalid, 0 Unknown, 359 Unchecked, 0.7s Time] [2022-01-18 15:32:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-01-18 15:32:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2441. [2022-01-18 15:32:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.664754098360656) internal successors, (8942), 2440 states have internal predecessors, (8942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 8942 transitions. [2022-01-18 15:32:43,250 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 8942 transitions. Word has length 23 [2022-01-18 15:32:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:43,250 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 8942 transitions. [2022-01-18 15:32:43,250 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) [2022-01-18 15:32:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 8942 transitions. [2022-01-18 15:32:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:43,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:43,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:43,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:43,463 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,SelfDestructingSolverStorable336 [2022-01-18 15:32:43,463 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash 742014579, now seen corresponding path program 321 times [2022-01-18 15:32:43,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134563355] [2022-01-18 15:32:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:43,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:43,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:43,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134563355] [2022-01-18 15:32:43,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134563355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:43,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052482272] [2022-01-18 15:32:43,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:43,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:43,536 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) [2022-01-18 15:32:43,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 15:32:43,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:32:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:43,960 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 181 treesize of output 157 [2022-01-18 15:32:44,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:44,252 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:32:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:44,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:44,608 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 214 treesize of output 194 [2022-01-18 15:32:44,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:44,807 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 179 [2022-01-18 15:32:44,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:44,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052482272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:44,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:44,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:32:44,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115418326] [2022-01-18 15:32:44,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:44,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:32:44,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:32:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:44,981 INFO L87 Difference]: Start difference. First operand 2441 states and 8942 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) [2022-01-18 15:32:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:45,232 INFO L93 Difference]: Finished difference Result 2815 states and 9973 transitions. [2022-01-18 15:32:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:32:45,232 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 [2022-01-18 15:32:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:45,237 INFO L225 Difference]: With dead ends: 2815 [2022-01-18 15:32:45,237 INFO L226 Difference]: Without dead ends: 2707 [2022-01-18 15:32:45,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:32:45,237 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 130 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:45,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 363 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 739 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-01-18 15:32:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2022-01-18 15:32:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2483. [2022-01-18 15:32:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 3.66116035455278) internal successors, (9087), 2482 states have internal predecessors, (9087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 9087 transitions. [2022-01-18 15:32:45,267 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 9087 transitions. Word has length 23 [2022-01-18 15:32:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:45,267 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 9087 transitions. [2022-01-18 15:32:45,267 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) [2022-01-18 15:32:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 9087 transitions. [2022-01-18 15:32:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:45,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:45,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:45,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 15:32:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:45,473 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1131286689, now seen corresponding path program 322 times [2022-01-18 15:32:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:45,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006673635] [2022-01-18 15:32:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:45,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:45,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006673635] [2022-01-18 15:32:45,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006673635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479923994] [2022-01-18 15:32:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:45,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:45,547 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) [2022-01-18 15:32:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 15:32:45,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:45,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:45,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:46,073 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 329 treesize of output 273 [2022-01-18 15:32:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:46,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 246 [2022-01-18 15:32:46,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 194 [2022-01-18 15:32:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:46,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:46,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:47,143 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 281 treesize of output 245 [2022-01-18 15:32:47,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:47,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 226 [2022-01-18 15:32:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479923994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:47,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:47,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:32:47,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124449125] [2022-01-18 15:32:47,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:47,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:32:47,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:32:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:32:47,361 INFO L87 Difference]: Start difference. First operand 2483 states and 9087 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) [2022-01-18 15:32:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:47,573 INFO L93 Difference]: Finished difference Result 2789 states and 9906 transitions. [2022-01-18 15:32:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:47,573 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 [2022-01-18 15:32:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:47,577 INFO L225 Difference]: With dead ends: 2789 [2022-01-18 15:32:47,577 INFO L226 Difference]: Without dead ends: 2745 [2022-01-18 15:32:47,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:32:47,577 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 331 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 633 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-01-18 15:32:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-01-18 15:32:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2529. [2022-01-18 15:32:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 3.6507120253164556) internal successors, (9229), 2528 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 9229 transitions. [2022-01-18 15:32:47,607 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 9229 transitions. Word has length 23 [2022-01-18 15:32:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:47,607 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 9229 transitions. [2022-01-18 15:32:47,607 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) [2022-01-18 15:32:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 9229 transitions. [2022-01-18 15:32:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:47,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:47,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:47,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:47,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:47,821 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1917848835, now seen corresponding path program 323 times [2022-01-18 15:32:47,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079403183] [2022-01-18 15:32:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:47,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:47,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:47,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079403183] [2022-01-18 15:32:47,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079403183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:47,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619622008] [2022-01-18 15:32:47,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:47,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:47,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:47,922 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) [2022-01-18 15:32:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 15:32:48,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:32:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:48,361 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 187 treesize of output 169 [2022-01-18 15:32:48,710 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 153 treesize of output 133 [2022-01-18 15:32:48,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:48,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 151 treesize of output 133 [2022-01-18 15:32:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:48,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:49,043 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 159 treesize of output 139 [2022-01-18 15:32:49,388 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 291 treesize of output 259 [2022-01-18 15:32:49,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:49,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 238 [2022-01-18 15:32:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:49,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619622008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:49,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:49,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:32:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553962324] [2022-01-18 15:32:49,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:49,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:32:49,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:32:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:32:49,606 INFO L87 Difference]: Start difference. First operand 2529 states and 9229 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) [2022-01-18 15:32:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:50,066 INFO L93 Difference]: Finished difference Result 3270 states and 11390 transitions. [2022-01-18 15:32:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:32:50,066 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 23 [2022-01-18 15:32:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:50,071 INFO L225 Difference]: With dead ends: 3270 [2022-01-18 15:32:50,071 INFO L226 Difference]: Without dead ends: 3188 [2022-01-18 15:32:50,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:32:50,071 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 167 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:50,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 373 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 811 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-18 15:32:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2022-01-18 15:32:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 2547. [2022-01-18 15:32:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.6402199528672425) internal successors, (9268), 2546 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 9268 transitions. [2022-01-18 15:32:50,107 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 9268 transitions. Word has length 23 [2022-01-18 15:32:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:50,107 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 9268 transitions. [2022-01-18 15:32:50,107 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) [2022-01-18 15:32:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 9268 transitions. [2022-01-18 15:32:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:50,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:50,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:50,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:50,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:50,331 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1887514251, now seen corresponding path program 324 times [2022-01-18 15:32:50,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025727786] [2022-01-18 15:32:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:50,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:50,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:50,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025727786] [2022-01-18 15:32:50,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025727786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:50,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122152694] [2022-01-18 15:32:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:50,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:50,478 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) [2022-01-18 15:32:50,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 15:32:50,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:50,985 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 222 treesize of output 188 [2022-01-18 15:32:51,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:51,165 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 195 treesize of output 169 [2022-01-18 15:32:51,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:51,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:51,685 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 247 treesize of output 223 [2022-01-18 15:32:52,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:52,128 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 264 [2022-01-18 15:32:52,132 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 232 treesize of output 198 [2022-01-18 15:32:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:52,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122152694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:52,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:52,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:32:52,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201678507] [2022-01-18 15:32:52,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:52,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:32:52,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:32:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:32:52,326 INFO L87 Difference]: Start difference. First operand 2547 states and 9268 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) [2022-01-18 15:32:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:53,037 INFO L93 Difference]: Finished difference Result 3720 states and 12947 transitions. [2022-01-18 15:32:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:32:53,037 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 23 [2022-01-18 15:32:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:53,044 INFO L225 Difference]: With dead ends: 3720 [2022-01-18 15:32:53,044 INFO L226 Difference]: Without dead ends: 3571 [2022-01-18 15:32:53,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:32:53,044 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 200 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:53,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 376 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 907 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-01-18 15:32:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2022-01-18 15:32:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 2669. [2022-01-18 15:32:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2668 states have (on average 3.672038980509745) internal successors, (9797), 2668 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 9797 transitions. [2022-01-18 15:32:53,083 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 9797 transitions. Word has length 23 [2022-01-18 15:32:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:53,083 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 9797 transitions. [2022-01-18 15:32:53,083 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) [2022-01-18 15:32:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 9797 transitions. [2022-01-18 15:32:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:53,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:53,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:53,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:53,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:53,308 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1492616411, now seen corresponding path program 325 times [2022-01-18 15:32:53,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:53,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834354866] [2022-01-18 15:32:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:53,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:32:53,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834354866] [2022-01-18 15:32:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834354866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065649354] [2022-01-18 15:32:53,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:53,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:53,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:53,392 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) [2022-01-18 15:32:53,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 15:32:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:32:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:53,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:54,228 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 145 treesize of output 125 [2022-01-18 15:32:54,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:54,231 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 15:32:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:54,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:54,655 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 [2022-01-18 15:32:55,025 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 323 treesize of output 279 [2022-01-18 15:32:55,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:55,034 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 298 treesize of output 264 [2022-01-18 15:32:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065649354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:55,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:55,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:32:55,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057840675] [2022-01-18 15:32:55,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:55,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:32:55,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:32:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:55,386 INFO L87 Difference]: Start difference. First operand 2669 states and 9797 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) [2022-01-18 15:32:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:57,622 INFO L93 Difference]: Finished difference Result 4159 states and 13887 transitions. [2022-01-18 15:32:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:32:57,622 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 23 [2022-01-18 15:32:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:57,628 INFO L225 Difference]: With dead ends: 4159 [2022-01-18 15:32:57,628 INFO L226 Difference]: Without dead ends: 3555 [2022-01-18 15:32:57,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=5074, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:32:57,629 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 211 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 4270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1360 Invalid, 4270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3302 Invalid, 0 Unknown, 902 Unchecked, 0.9s Time] [2022-01-18 15:32:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2022-01-18 15:32:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2776. [2022-01-18 15:32:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.6385585585585587) internal successors, (10097), 2775 states have internal predecessors, (10097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 10097 transitions. [2022-01-18 15:32:57,664 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 10097 transitions. Word has length 23 [2022-01-18 15:32:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:57,664 INFO L470 AbstractCegarLoop]: Abstraction has 2776 states and 10097 transitions. [2022-01-18 15:32:57,664 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) [2022-01-18 15:32:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 10097 transitions. [2022-01-18 15:32:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:32:57,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:57,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:57,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-18 15:32:57,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:57,885 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:32:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash -918548905, now seen corresponding path program 326 times [2022-01-18 15:32:57,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:57,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857426808] [2022-01-18 15:32:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:57,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:58,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:58,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857426808] [2022-01-18 15:32:58,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857426808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:58,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356345695] [2022-01-18 15:32:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:58,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:58,009 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) [2022-01-18 15:32:58,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 15:32:58,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:58,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:58,535 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 327 treesize of output 271 [2022-01-18 15:32:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:59,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 349 treesize of output 291 [2022-01-18 15:32:59,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 235 [2022-01-18 15:32:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:59,506 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 151 [2022-01-18 15:32:59,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:32:59,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:32:59,780 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 195 treesize of output 181 [2022-01-18 15:32:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356345695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:59,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:59,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:32:59,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764537574] [2022-01-18 15:32:59,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:59,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:32:59,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:32:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:59,978 INFO L87 Difference]: Start difference. First operand 2776 states and 10097 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) [2022-01-18 15:33:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:01,416 INFO L93 Difference]: Finished difference Result 3512 states and 12196 transitions. [2022-01-18 15:33:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:33:01,416 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 [2022-01-18 15:33:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:01,421 INFO L225 Difference]: With dead ends: 3512 [2022-01-18 15:33:01,422 INFO L226 Difference]: Without dead ends: 3408 [2022-01-18 15:33:01,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:33:01,422 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 144 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:01,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 846 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1828 Invalid, 0 Unknown, 168 Unchecked, 0.7s Time] [2022-01-18 15:33:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-01-18 15:33:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2770. [2022-01-18 15:33:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 3.644637053087757) internal successors, (10092), 2769 states have internal predecessors, (10092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 10092 transitions. [2022-01-18 15:33:01,457 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 10092 transitions. Word has length 23 [2022-01-18 15:33:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:01,457 INFO L470 AbstractCegarLoop]: Abstraction has 2770 states and 10092 transitions. [2022-01-18 15:33:01,457 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) [2022-01-18 15:33:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 10092 transitions. [2022-01-18 15:33:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:01,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:01,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:01,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-18 15:33:01,675 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,SelfDestructingSolverStorable342 [2022-01-18 15:33:01,675 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -470551259, now seen corresponding path program 327 times [2022-01-18 15:33:01,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369617628] [2022-01-18 15:33:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:01,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:33:01,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369617628] [2022-01-18 15:33:01,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369617628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:01,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272158] [2022-01-18 15:33:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:01,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:01,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:01,794 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) [2022-01-18 15:33:01,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 15:33:02,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:02,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:02,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:02,277 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 187 treesize of output 163 [2022-01-18 15:33:02,750 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 148 treesize of output 128 [2022-01-18 15:33:02,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:02,753 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 15:33:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:02,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:03,062 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 274 treesize of output 246 [2022-01-18 15:33:03,406 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 310 treesize of output 266 [2022-01-18 15:33:03,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:03,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:33:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:03,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:03,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:33:03,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070598867] [2022-01-18 15:33:03,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:03,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:33:03,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:33:03,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:03,634 INFO L87 Difference]: Start difference. First operand 2770 states and 10092 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) [2022-01-18 15:33:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:05,135 INFO L93 Difference]: Finished difference Result 4163 states and 13924 transitions. [2022-01-18 15:33:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:33:05,135 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 23 [2022-01-18 15:33:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:05,142 INFO L225 Difference]: With dead ends: 4163 [2022-01-18 15:33:05,142 INFO L226 Difference]: Without dead ends: 3871 [2022-01-18 15:33:05,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 15:33:05,143 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 245 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:05,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 658 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1515 Invalid, 0 Unknown, 357 Unchecked, 0.4s Time] [2022-01-18 15:33:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2022-01-18 15:33:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 2835. [2022-01-18 15:33:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2834 states have (on average 3.642907551164432) internal successors, (10324), 2834 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 10324 transitions. [2022-01-18 15:33:05,201 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 10324 transitions. Word has length 23 [2022-01-18 15:33:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:05,201 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 10324 transitions. [2022-01-18 15:33:05,201 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) [2022-01-18 15:33:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 10324 transitions. [2022-01-18 15:33:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:05,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:05,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:05,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:05,406 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,SelfDestructingSolverStorable343 [2022-01-18 15:33:05,406 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:05,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1359286353, now seen corresponding path program 328 times [2022-01-18 15:33:05,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:05,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381519670] [2022-01-18 15:33:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:05,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:33:05,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381519670] [2022-01-18 15:33:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381519670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831105216] [2022-01-18 15:33:05,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:05,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:05,537 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) [2022-01-18 15:33:05,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 15:33:05,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:05,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:06,007 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 137 [2022-01-18 15:33:06,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:06,334 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 15:33:06,336 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 134 treesize of output 120 [2022-01-18 15:33:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:06,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:06,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:06,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:06,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 179 [2022-01-18 15:33:06,818 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 168 treesize of output 148 [2022-01-18 15:33:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:07,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831105216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:07,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:07,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:33:07,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144506765] [2022-01-18 15:33:07,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:07,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:33:07,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:33:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:07,022 INFO L87 Difference]: Start difference. First operand 2835 states and 10324 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) [2022-01-18 15:33:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:08,112 INFO L93 Difference]: Finished difference Result 4005 states and 13567 transitions. [2022-01-18 15:33:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:33:08,112 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 [2022-01-18 15:33:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:08,120 INFO L225 Difference]: With dead ends: 4005 [2022-01-18 15:33:08,120 INFO L226 Difference]: Without dead ends: 3812 [2022-01-18 15:33:08,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=2978, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:33:08,120 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 211 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:08,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 879 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1563 Invalid, 0 Unknown, 565 Unchecked, 0.4s Time] [2022-01-18 15:33:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2022-01-18 15:33:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 2878. [2022-01-18 15:33:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.6478971150504) internal successors, (10495), 2877 states have internal predecessors, (10495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 10495 transitions. [2022-01-18 15:33:08,163 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 10495 transitions. Word has length 23 [2022-01-18 15:33:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:08,163 INFO L470 AbstractCegarLoop]: Abstraction has 2878 states and 10495 transitions. [2022-01-18 15:33:08,163 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) [2022-01-18 15:33:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 10495 transitions. [2022-01-18 15:33:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:08,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:08,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:08,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:08,384 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,SelfDestructingSolverStorable344 [2022-01-18 15:33:08,384 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1107162753, now seen corresponding path program 329 times [2022-01-18 15:33:08,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:08,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571156378] [2022-01-18 15:33:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:08,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:08,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571156378] [2022-01-18 15:33:08,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571156378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403833337] [2022-01-18 15:33:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:08,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:08,588 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) [2022-01-18 15:33:08,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 15:33:08,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:33:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:09,042 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 177 treesize of output 159 [2022-01-18 15:33:09,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:09,278 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 142 treesize of output 124 [2022-01-18 15:33:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:33:09,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:09,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:09,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:09,902 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:09,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 131 [2022-01-18 15:33:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:33:10,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403833337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:10,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:10,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-01-18 15:33:10,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983100316] [2022-01-18 15:33:10,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:10,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:33:10,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:33:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:33:10,093 INFO L87 Difference]: Start difference. First operand 2878 states and 10495 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) [2022-01-18 15:33:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:18,220 INFO L93 Difference]: Finished difference Result 5912 states and 19333 transitions. [2022-01-18 15:33:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-18 15:33:18,220 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 [2022-01-18 15:33:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:18,229 INFO L225 Difference]: With dead ends: 5912 [2022-01-18 15:33:18,229 INFO L226 Difference]: Without dead ends: 5402 [2022-01-18 15:33:18,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2490, Invalid=22632, Unknown=0, NotChecked=0, Total=25122 [2022-01-18 15:33:18,230 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 590 mSDsluCounter, 2977 mSDsCounter, 0 mSdLazyCounter, 4824 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 5048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 4824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:18,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 1418 Invalid, 5048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4824 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:33:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2022-01-18 15:33:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 2946. [2022-01-18 15:33:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.6278438030560274) internal successors, (10684), 2945 states have internal predecessors, (10684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10684 transitions. [2022-01-18 15:33:18,279 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10684 transitions. Word has length 23 [2022-01-18 15:33:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:18,279 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10684 transitions. [2022-01-18 15:33:18,279 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) [2022-01-18 15:33:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10684 transitions. [2022-01-18 15:33:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:18,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:18,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:18,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:18,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 15:33:18,488 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1843242201, now seen corresponding path program 330 times [2022-01-18 15:33:18,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:18,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261700417] [2022-01-18 15:33:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:18,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:18,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:18,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261700417] [2022-01-18 15:33:18,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261700417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:18,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599911759] [2022-01-18 15:33:18,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:18,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:18,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:18,589 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) [2022-01-18 15:33:18,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 15:33:18,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:19,129 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 244 treesize of output 218 [2022-01-18 15:33:19,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 188 [2022-01-18 15:33:19,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:33:19,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:19,649 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 188 treesize of output 164 [2022-01-18 15:33:20,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:20,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 308 [2022-01-18 15:33:20,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 236 [2022-01-18 15:33:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:33:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599911759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:20,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:20,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 15:33:20,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132026833] [2022-01-18 15:33:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:33:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:33:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:20,173 INFO L87 Difference]: Start difference. First operand 2946 states and 10684 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-01-18 15:33:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:23,721 INFO L93 Difference]: Finished difference Result 6259 states and 20627 transitions. [2022-01-18 15:33:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-18 15:33:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 [2022-01-18 15:33:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:23,730 INFO L225 Difference]: With dead ends: 6259 [2022-01-18 15:33:23,731 INFO L226 Difference]: Without dead ends: 5884 [2022-01-18 15:33:23,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=989, Invalid=14511, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 15:33:23,732 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 439 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 5423 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 5636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 5423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:23,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 1500 Invalid, 5636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5423 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 15:33:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2022-01-18 15:33:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 3029. [2022-01-18 15:33:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.6449801849405548) internal successors, (11037), 3028 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 11037 transitions. [2022-01-18 15:33:23,788 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 11037 transitions. Word has length 23 [2022-01-18 15:33:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:23,788 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 11037 transitions. [2022-01-18 15:33:23,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-01-18 15:33:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 11037 transitions. [2022-01-18 15:33:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:23,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:23,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:23,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:24,008 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1821663053, now seen corresponding path program 331 times [2022-01-18 15:33:24,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100027285] [2022-01-18 15:33:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:24,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:24,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100027285] [2022-01-18 15:33:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100027285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635336632] [2022-01-18 15:33:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:24,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:24,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:24,089 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) [2022-01-18 15:33:24,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 15:33:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:24,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:24,706 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 257 treesize of output 225 [2022-01-18 15:33:24,709 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 188 treesize of output 154 [2022-01-18 15:33:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:24,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:25,238 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 241 treesize of output 209 [2022-01-18 15:33:25,685 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 314 treesize of output 270 [2022-01-18 15:33:25,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:25,693 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 281 treesize of output 249 [2022-01-18 15:33:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:25,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635336632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:25,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:25,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:33:25,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107042882] [2022-01-18 15:33:25,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:25,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:33:25,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:33:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:33:25,902 INFO L87 Difference]: Start difference. First operand 3029 states and 11037 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) [2022-01-18 15:33:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:33,232 INFO L93 Difference]: Finished difference Result 7307 states and 23749 transitions. [2022-01-18 15:33:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-18 15:33:33,232 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 [2022-01-18 15:33:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:33,244 INFO L225 Difference]: With dead ends: 7307 [2022-01-18 15:33:33,244 INFO L226 Difference]: Without dead ends: 6913 [2022-01-18 15:33:33,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12541 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2687, Invalid=29533, Unknown=0, NotChecked=0, Total=32220 [2022-01-18 15:33:33,247 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 582 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 4852 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 4852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:33,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1579 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 4852 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:33:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2022-01-18 15:33:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 3198. [2022-01-18 15:33:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 3.687832342821395) internal successors, (11790), 3197 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 11790 transitions. [2022-01-18 15:33:33,315 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 11790 transitions. Word has length 23 [2022-01-18 15:33:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 3198 states and 11790 transitions. [2022-01-18 15:33:33,315 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) [2022-01-18 15:33:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 11790 transitions. [2022-01-18 15:33:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:33,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:33,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:33,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-01-18 15:33:33,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:33,527 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1846064363, now seen corresponding path program 332 times [2022-01-18 15:33:33,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:33,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565788278] [2022-01-18 15:33:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:33,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:33,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565788278] [2022-01-18 15:33:33,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565788278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40979249] [2022-01-18 15:33:33,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:33,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:33,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:33,636 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) [2022-01-18 15:33:33,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 15:33:33,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:34,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:34,351 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 274 treesize of output 234 [2022-01-18 15:33:34,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 180 [2022-01-18 15:33:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:34,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:34,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:34,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:34,788 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 166 treesize of output 152 [2022-01-18 15:33:34,791 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 143 treesize of output 127 [2022-01-18 15:33:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:34,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40979249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:34,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:34,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:33:34,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087169024] [2022-01-18 15:33:34,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:34,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:33:34,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:33:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:33:34,916 INFO L87 Difference]: Start difference. First operand 3198 states and 11790 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) [2022-01-18 15:33:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:39,697 INFO L93 Difference]: Finished difference Result 6436 states and 21200 transitions. [2022-01-18 15:33:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-18 15:33:39,697 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 [2022-01-18 15:33:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:39,707 INFO L225 Difference]: With dead ends: 6436 [2022-01-18 15:33:39,707 INFO L226 Difference]: Without dead ends: 6032 [2022-01-18 15:33:39,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1533, Invalid=17927, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 15:33:39,709 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 425 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 4020 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 4224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 4020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:39,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1305 Invalid, 4224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 4020 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:33:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6032 states. [2022-01-18 15:33:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6032 to 3124. [2022-01-18 15:33:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.665385846942043) internal successors, (11447), 3123 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 11447 transitions. [2022-01-18 15:33:39,794 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 11447 transitions. Word has length 23 [2022-01-18 15:33:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:39,794 INFO L470 AbstractCegarLoop]: Abstraction has 3124 states and 11447 transitions. [2022-01-18 15:33:39,794 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) [2022-01-18 15:33:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 11447 transitions. [2022-01-18 15:33:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:39,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:39,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:39,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:40,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-01-18 15:33:40,008 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -69343389, now seen corresponding path program 333 times [2022-01-18 15:33:40,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320884281] [2022-01-18 15:33:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:40,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:40,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320884281] [2022-01-18 15:33:40,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320884281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896123147] [2022-01-18 15:33:40,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:40,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:40,104 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) [2022-01-18 15:33:40,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 15:33:40,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:33:40,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:40,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:40,567 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 222 treesize of output 188 [2022-01-18 15:33:40,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:40,763 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 131 [2022-01-18 15:33:40,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:40,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:40,996 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 159 treesize of output 143 [2022-01-18 15:33:41,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:41,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:41,243 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 176 treesize of output 162 [2022-01-18 15:33:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896123147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:41,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:41,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-01-18 15:33:41,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837623481] [2022-01-18 15:33:41,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:41,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:33:41,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:41,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:33:41,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:33:41,434 INFO L87 Difference]: Start difference. First operand 3124 states and 11447 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) [2022-01-18 15:33:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:42,218 INFO L93 Difference]: Finished difference Result 4498 states and 15807 transitions. [2022-01-18 15:33:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:33:42,218 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 [2022-01-18 15:33:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:42,225 INFO L225 Difference]: With dead ends: 4498 [2022-01-18 15:33:42,225 INFO L226 Difference]: Without dead ends: 4380 [2022-01-18 15:33:42,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:33:42,225 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 158 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:42,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 466 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1349 Invalid, 0 Unknown, 172 Unchecked, 0.4s Time] [2022-01-18 15:33:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4380 states. [2022-01-18 15:33:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4380 to 3323. [2022-01-18 15:33:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3323 states, 3322 states have (on average 3.694762191450933) internal successors, (12274), 3322 states have internal predecessors, (12274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3323 states to 3323 states and 12274 transitions. [2022-01-18 15:33:42,273 INFO L78 Accepts]: Start accepts. Automaton has 3323 states and 12274 transitions. Word has length 23 [2022-01-18 15:33:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:42,273 INFO L470 AbstractCegarLoop]: Abstraction has 3323 states and 12274 transitions. [2022-01-18 15:33:42,273 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) [2022-01-18 15:33:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3323 states and 12274 transitions. [2022-01-18 15:33:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:42,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:42,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:42,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-01-18 15:33:42,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-01-18 15:33:42,491 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1527128419, now seen corresponding path program 334 times [2022-01-18 15:33:42,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:42,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107856021] [2022-01-18 15:33:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:42,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:42,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107856021] [2022-01-18 15:33:42,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107856021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660684093] [2022-01-18 15:33:42,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:42,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:42,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:42,609 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) [2022-01-18 15:33:42,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 15:33:42,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:33:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:43,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:43,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:43,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:43,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:43,776 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 314 treesize of output 278 [2022-01-18 15:33:44,248 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 312 treesize of output 276 [2022-01-18 15:33:44,257 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:44,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 240 [2022-01-18 15:33:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:44,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660684093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:44,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:44,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 15:33:44,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424742698] [2022-01-18 15:33:44,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:44,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:33:44,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:33:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:44,477 INFO L87 Difference]: Start difference. First operand 3323 states and 12274 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) [2022-01-18 15:33:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:49,129 INFO L93 Difference]: Finished difference Result 5996 states and 20111 transitions. [2022-01-18 15:33:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-18 15:33:49,129 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 [2022-01-18 15:33:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:49,138 INFO L225 Difference]: With dead ends: 5996 [2022-01-18 15:33:49,139 INFO L226 Difference]: Without dead ends: 5689 [2022-01-18 15:33:49,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4745 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1175, Invalid=13345, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 15:33:49,140 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 417 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 5735 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 5922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 5735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:49,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1662 Invalid, 5922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 5735 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:33:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2022-01-18 15:33:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3348. [2022-01-18 15:33:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3348 states, 3347 states have (on average 3.691066626829997) internal successors, (12354), 3347 states have internal predecessors, (12354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3348 states to 3348 states and 12354 transitions. [2022-01-18 15:33:49,195 INFO L78 Accepts]: Start accepts. Automaton has 3348 states and 12354 transitions. Word has length 23 [2022-01-18 15:33:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:49,196 INFO L470 AbstractCegarLoop]: Abstraction has 3348 states and 12354 transitions. [2022-01-18 15:33:49,196 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) [2022-01-18 15:33:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3348 states and 12354 transitions. [2022-01-18 15:33:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:49,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:49,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:49,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 15:33:49,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:49,417 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1438999053, now seen corresponding path program 335 times [2022-01-18 15:33:49,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:49,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667703348] [2022-01-18 15:33:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:49,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:49,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:49,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667703348] [2022-01-18 15:33:49,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667703348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:49,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270438010] [2022-01-18 15:33:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:49,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:49,485 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) [2022-01-18 15:33:49,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 15:33:49,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:49,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:49,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:33:49,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:49,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 150 [2022-01-18 15:33:50,377 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 182 treesize of output 156 [2022-01-18 15:33:50,380 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 160 treesize of output 140 [2022-01-18 15:33:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:51,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:51,558 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 355 treesize of output 313 [2022-01-18 15:33:52,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:52,018 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 54 treesize of output 50 [2022-01-18 15:33:52,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:52,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-01-18 15:33:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:52,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270438010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:52,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:52,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 30 [2022-01-18 15:33:52,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722769160] [2022-01-18 15:33:52,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:52,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:33:52,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:33:52,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:33:52,139 INFO L87 Difference]: Start difference. First operand 3348 states and 12354 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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) [2022-01-18 15:33:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:56,689 INFO L93 Difference]: Finished difference Result 5844 states and 19888 transitions. [2022-01-18 15:33:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 15:33:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 [2022-01-18 15:33:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:56,699 INFO L225 Difference]: With dead ends: 5844 [2022-01-18 15:33:56,699 INFO L226 Difference]: Without dead ends: 5682 [2022-01-18 15:33:56,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1179, Invalid=12161, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 15:33:56,700 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 319 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 4237 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 4389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:56,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1327 Invalid, 4389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4237 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 15:33:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5682 states. [2022-01-18 15:33:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5682 to 3368. [2022-01-18 15:33:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.688743688743689) internal successors, (12420), 3367 states have internal predecessors, (12420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 12420 transitions. [2022-01-18 15:33:56,754 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 12420 transitions. Word has length 23 [2022-01-18 15:33:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:56,755 INFO L470 AbstractCegarLoop]: Abstraction has 3368 states and 12420 transitions. [2022-01-18 15:33:56,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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) [2022-01-18 15:33:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 12420 transitions. [2022-01-18 15:33:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:56,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:56,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:56,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-18 15:33:56,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:56,961 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1904313095, now seen corresponding path program 336 times [2022-01-18 15:33:56,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:56,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577784279] [2022-01-18 15:33:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:56,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:57,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577784279] [2022-01-18 15:33:57,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577784279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284573875] [2022-01-18 15:33:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:57,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:57,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:57,076 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) [2022-01-18 15:33:57,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 15:33:57,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:33:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:57,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:57,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:57,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 241 treesize of output 211 [2022-01-18 15:33:57,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:33:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:58,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:58,285 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 206 treesize of output 186 [2022-01-18 15:33:58,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:33:58,562 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 262 treesize of output 240 [2022-01-18 15:33:58,567 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 223 treesize of output 199 [2022-01-18 15:33:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:58,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284573875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:58,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:58,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:33:58,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410380105] [2022-01-18 15:33:58,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:58,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:33:58,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:33:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:33:58,822 INFO L87 Difference]: Start difference. First operand 3368 states and 12420 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) [2022-01-18 15:33:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:59,106 INFO L93 Difference]: Finished difference Result 3994 states and 14110 transitions. [2022-01-18 15:33:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:59,107 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 [2022-01-18 15:33:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:59,113 INFO L225 Difference]: With dead ends: 3994 [2022-01-18 15:33:59,113 INFO L226 Difference]: Without dead ends: 3855 [2022-01-18 15:33:59,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:59,113 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:59,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 287 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 594 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-01-18 15:33:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2022-01-18 15:33:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3458. [2022-01-18 15:33:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 3.6699450390512003) internal successors, (12687), 3457 states have internal predecessors, (12687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 12687 transitions. [2022-01-18 15:33:59,189 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 12687 transitions. Word has length 23 [2022-01-18 15:33:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:59,189 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 12687 transitions. [2022-01-18 15:33:59,189 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) [2022-01-18 15:33:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 12687 transitions. [2022-01-18 15:33:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:33:59,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:59,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:59,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:59,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:59,409 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:33:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -682523987, now seen corresponding path program 337 times [2022-01-18 15:33:59,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:59,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762966647] [2022-01-18 15:33:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:59,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:59,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762966647] [2022-01-18 15:33:59,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762966647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459798654] [2022-01-18 15:33:59,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:59,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:59,536 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) [2022-01-18 15:33:59,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 15:33:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:33:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:59,941 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 288 treesize of output 250 [2022-01-18 15:34:00,240 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 145 treesize of output 125 [2022-01-18 15:34:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:00,242 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 144 treesize of output 126 [2022-01-18 15:34:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:00,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:00,569 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 277 treesize of output 233 [2022-01-18 15:34:00,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:00,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:00,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 148 [2022-01-18 15:34:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:01,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459798654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:01,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:34:01,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390228892] [2022-01-18 15:34:01,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:01,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:34:01,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:34:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:34:01,157 INFO L87 Difference]: Start difference. First operand 3458 states and 12687 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-01-18 15:34:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:01,639 INFO L93 Difference]: Finished difference Result 3880 states and 13785 transitions. [2022-01-18 15:34:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:34:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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 [2022-01-18 15:34:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:01,645 INFO L225 Difference]: With dead ends: 3880 [2022-01-18 15:34:01,645 INFO L226 Difference]: Without dead ends: 3811 [2022-01-18 15:34:01,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:34:01,646 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 101 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 396 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 682 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-01-18 15:34:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2022-01-18 15:34:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3500. [2022-01-18 15:34:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 3499 states have (on average 3.6616176050300084) internal successors, (12812), 3499 states have internal predecessors, (12812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 12812 transitions. [2022-01-18 15:34:01,690 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 12812 transitions. Word has length 23 [2022-01-18 15:34:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:01,690 INFO L470 AbstractCegarLoop]: Abstraction has 3500 states and 12812 transitions. [2022-01-18 15:34:01,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-01-18 15:34:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 12812 transitions. [2022-01-18 15:34:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:01,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:01,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:01,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:01,906 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,SelfDestructingSolverStorable353 [2022-01-18 15:34:01,906 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1531146459, now seen corresponding path program 338 times [2022-01-18 15:34:01,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:01,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215279076] [2022-01-18 15:34:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:01,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:02,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215279076] [2022-01-18 15:34:02,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215279076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965541804] [2022-01-18 15:34:02,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:02,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:02,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:02,014 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) [2022-01-18 15:34:02,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 15:34:02,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:02,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:02,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:02,497 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 181 treesize of output 163 [2022-01-18 15:34:02,857 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 276 treesize of output 248 [2022-01-18 15:34:02,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:02,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 280 treesize of output 234 [2022-01-18 15:34:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:03,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:03,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:03,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:03,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:34:03,576 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 223 treesize of output 199 [2022-01-18 15:34:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:03,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965541804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:03,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:03,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:34:03,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871720643] [2022-01-18 15:34:03,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:03,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:34:03,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:34:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:03,804 INFO L87 Difference]: Start difference. First operand 3500 states and 12812 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) [2022-01-18 15:34:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:03,947 INFO L93 Difference]: Finished difference Result 3948 states and 14030 transitions. [2022-01-18 15:34:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:34:03,948 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 [2022-01-18 15:34:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:03,954 INFO L225 Difference]: With dead ends: 3948 [2022-01-18 15:34:03,954 INFO L226 Difference]: Without dead ends: 3903 [2022-01-18 15:34:03,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:34:03,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:03,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 195 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 470 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-01-18 15:34:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-01-18 15:34:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3496. [2022-01-18 15:34:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3495 states have (on average 3.6618025751072962) internal successors, (12798), 3495 states have internal predecessors, (12798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 12798 transitions. [2022-01-18 15:34:04,018 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 12798 transitions. Word has length 23 [2022-01-18 15:34:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:04,018 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 12798 transitions. [2022-01-18 15:34:04,018 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) [2022-01-18 15:34:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 12798 transitions. [2022-01-18 15:34:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:04,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:04,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:04,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:04,227 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,SelfDestructingSolverStorable354 [2022-01-18 15:34:04,227 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash -850820787, now seen corresponding path program 339 times [2022-01-18 15:34:04,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:04,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081421169] [2022-01-18 15:34:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:04,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:04,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081421169] [2022-01-18 15:34:04,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081421169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691013114] [2022-01-18 15:34:04,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:04,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:04,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:04,368 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) [2022-01-18 15:34:04,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 15:34:04,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:34:04,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:34:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:04,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:05,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 230 [2022-01-18 15:34:05,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:05,231 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 210 [2022-01-18 15:34:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:05,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:05,693 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 188 treesize of output 168 [2022-01-18 15:34:06,113 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 188 treesize of output 164 [2022-01-18 15:34:06,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:06,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 170 [2022-01-18 15:34:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:06,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691013114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:06,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:06,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 15:34:06,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36011655] [2022-01-18 15:34:06,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:06,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:34:06,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:34:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:34:06,451 INFO L87 Difference]: Start difference. First operand 3496 states and 12798 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) [2022-01-18 15:34:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:07,125 INFO L93 Difference]: Finished difference Result 4319 states and 15255 transitions. [2022-01-18 15:34:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:34:07,125 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 [2022-01-18 15:34:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:07,133 INFO L225 Difference]: With dead ends: 4319 [2022-01-18 15:34:07,133 INFO L226 Difference]: Without dead ends: 4259 [2022-01-18 15:34:07,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:34:07,133 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:07,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 463 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1246 Invalid, 0 Unknown, 451 Unchecked, 0.4s Time] [2022-01-18 15:34:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2022-01-18 15:34:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3501. [2022-01-18 15:34:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 3.6631428571428573) internal successors, (12821), 3500 states have internal predecessors, (12821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 12821 transitions. [2022-01-18 15:34:07,181 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 12821 transitions. Word has length 23 [2022-01-18 15:34:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:07,181 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 12821 transitions. [2022-01-18 15:34:07,181 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) [2022-01-18 15:34:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 12821 transitions. [2022-01-18 15:34:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:07,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:07,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:07,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:07,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 15:34:07,387 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1330873749, now seen corresponding path program 340 times [2022-01-18 15:34:07,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:07,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865215625] [2022-01-18 15:34:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:07,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:07,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:07,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865215625] [2022-01-18 15:34:07,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865215625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:07,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141854637] [2022-01-18 15:34:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:07,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:07,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:07,488 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) [2022-01-18 15:34:07,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 15:34:07,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:07,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:08,048 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 274 treesize of output 242 [2022-01-18 15:34:08,346 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 219 treesize of output 187 [2022-01-18 15:34:08,348 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 163 treesize of output 147 [2022-01-18 15:34:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:08,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:08,712 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 312 treesize of output 280 [2022-01-18 15:34:08,984 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 159 treesize of output 139 [2022-01-18 15:34:08,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:08,990 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 142 [2022-01-18 15:34:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:09,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141854637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:09,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:09,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:34:09,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428019163] [2022-01-18 15:34:09,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:09,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:09,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:09,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:09,224 INFO L87 Difference]: Start difference. First operand 3501 states and 12821 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) [2022-01-18 15:34:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:09,720 INFO L93 Difference]: Finished difference Result 4426 states and 15463 transitions. [2022-01-18 15:34:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:34:09,720 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 [2022-01-18 15:34:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:09,727 INFO L225 Difference]: With dead ends: 4426 [2022-01-18 15:34:09,727 INFO L226 Difference]: Without dead ends: 4310 [2022-01-18 15:34:09,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:34:09,727 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 168 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:09,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 367 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:34:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2022-01-18 15:34:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3636. [2022-01-18 15:34:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 3.666850068775791) internal successors, (13329), 3635 states have internal predecessors, (13329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 13329 transitions. [2022-01-18 15:34:09,801 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 13329 transitions. Word has length 23 [2022-01-18 15:34:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:09,801 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 13329 transitions. [2022-01-18 15:34:09,801 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) [2022-01-18 15:34:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 13329 transitions. [2022-01-18 15:34:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:09,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:09,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:09,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:10,015 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,SelfDestructingSolverStorable356 [2022-01-18 15:34:10,015 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash 843174631, now seen corresponding path program 341 times [2022-01-18 15:34:10,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:10,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637664619] [2022-01-18 15:34:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:10,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:10,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:10,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637664619] [2022-01-18 15:34:10,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637664619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:10,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761655021] [2022-01-18 15:34:10,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:10,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:10,115 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) [2022-01-18 15:34:10,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 15:34:10,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:34:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:10,507 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 165 treesize of output 141 [2022-01-18 15:34:10,776 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 271 treesize of output 229 [2022-01-18 15:34:10,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:10,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:11,092 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 247 treesize of output 223 [2022-01-18 15:34:11,457 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 188 treesize of output 164 [2022-01-18 15:34:11,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:11,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:34:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:11,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761655021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:11,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:11,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:34:11,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922061023] [2022-01-18 15:34:11,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:11,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:34:11,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:34:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:11,675 INFO L87 Difference]: Start difference. First operand 3636 states and 13329 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) [2022-01-18 15:34:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:14,513 INFO L93 Difference]: Finished difference Result 5485 states and 18968 transitions. [2022-01-18 15:34:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 15:34:14,513 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 [2022-01-18 15:34:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:14,522 INFO L225 Difference]: With dead ends: 5485 [2022-01-18 15:34:14,522 INFO L226 Difference]: Without dead ends: 5283 [2022-01-18 15:34:14,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=804, Invalid=8898, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 15:34:14,523 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 348 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 3863 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 4045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 3863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:14,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1133 Invalid, 4045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 3863 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:34:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2022-01-18 15:34:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 3608. [2022-01-18 15:34:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3608 states, 3607 states have (on average 3.684779595231494) internal successors, (13291), 3607 states have internal predecessors, (13291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 13291 transitions. [2022-01-18 15:34:14,599 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 13291 transitions. Word has length 23 [2022-01-18 15:34:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:14,599 INFO L470 AbstractCegarLoop]: Abstraction has 3608 states and 13291 transitions. [2022-01-18 15:34:14,599 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) [2022-01-18 15:34:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 13291 transitions. [2022-01-18 15:34:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:14,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:14,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:14,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:14,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:14,820 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash -32007159, now seen corresponding path program 342 times [2022-01-18 15:34:14,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:14,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142451835] [2022-01-18 15:34:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:14,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:14,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142451835] [2022-01-18 15:34:14,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142451835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751255936] [2022-01-18 15:34:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:14,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:14,958 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) [2022-01-18 15:34:14,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 15:34:15,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:34:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:15,441 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 222 treesize of output 188 [2022-01-18 15:34:15,805 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 212 treesize of output 184 [2022-01-18 15:34:15,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:15,809 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 174 [2022-01-18 15:34:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:34:16,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:16,387 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 235 treesize of output 207 [2022-01-18 15:34:16,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:16,854 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 328 treesize of output 290 [2022-01-18 15:34:16,858 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 255 treesize of output 223 [2022-01-18 15:34:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:34:17,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751255936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:17,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:17,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-01-18 15:34:17,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843586072] [2022-01-18 15:34:17,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:17,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:34:17,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:34:17,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:17,095 INFO L87 Difference]: Start difference. First operand 3608 states and 13291 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) [2022-01-18 15:34:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:19,536 INFO L93 Difference]: Finished difference Result 5502 states and 18961 transitions. [2022-01-18 15:34:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 15:34:19,536 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 [2022-01-18 15:34:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:19,562 INFO L225 Difference]: With dead ends: 5502 [2022-01-18 15:34:19,562 INFO L226 Difference]: Without dead ends: 5269 [2022-01-18 15:34:19,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=660, Invalid=7530, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 15:34:19,562 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 309 mSDsluCounter, 2880 mSDsCounter, 0 mSdLazyCounter, 3672 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:19,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1686 Invalid, 4341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3672 Invalid, 0 Unknown, 567 Unchecked, 1.0s Time] [2022-01-18 15:34:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5269 states. [2022-01-18 15:34:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5269 to 3676. [2022-01-18 15:34:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.6868027210884353) internal successors, (13549), 3675 states have internal predecessors, (13549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 13549 transitions. [2022-01-18 15:34:19,614 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 13549 transitions. Word has length 23 [2022-01-18 15:34:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:19,614 INFO L470 AbstractCegarLoop]: Abstraction has 3676 states and 13549 transitions. [2022-01-18 15:34:19,614 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) [2022-01-18 15:34:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 13549 transitions. [2022-01-18 15:34:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:19,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:19,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:19,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:19,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-01-18 15:34:19,834 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:19,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1581798503, now seen corresponding path program 343 times [2022-01-18 15:34:19,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:19,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793152284] [2022-01-18 15:34:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:19,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:19,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793152284] [2022-01-18 15:34:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793152284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611873638] [2022-01-18 15:34:19,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:19,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:19,946 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) [2022-01-18 15:34:19,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 15:34:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:20,396 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 136 treesize of output 120 [2022-01-18 15:34:20,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:20,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 191 treesize of output 165 [2022-01-18 15:34:20,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 145 [2022-01-18 15:34:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:20,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:21,124 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 199 treesize of output 179 [2022-01-18 15:34:21,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:21,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 226 [2022-01-18 15:34:21,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 174 [2022-01-18 15:34:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:21,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611873638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:21,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:21,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-01-18 15:34:21,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164448911] [2022-01-18 15:34:21,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:21,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:21,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:21,543 INFO L87 Difference]: Start difference. First operand 3676 states and 13549 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) [2022-01-18 15:34:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:22,648 INFO L93 Difference]: Finished difference Result 5045 states and 17477 transitions. [2022-01-18 15:34:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:34:22,649 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 [2022-01-18 15:34:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:22,657 INFO L225 Difference]: With dead ends: 5045 [2022-01-18 15:34:22,657 INFO L226 Difference]: Without dead ends: 4949 [2022-01-18 15:34:22,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:34:22,658 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 237 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:22,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 719 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1984 Invalid, 0 Unknown, 269 Unchecked, 0.6s Time] [2022-01-18 15:34:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-01-18 15:34:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 3644. [2022-01-18 15:34:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 3.683502607740873) internal successors, (13419), 3643 states have internal predecessors, (13419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 13419 transitions. [2022-01-18 15:34:22,716 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 13419 transitions. Word has length 23 [2022-01-18 15:34:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:22,716 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 13419 transitions. [2022-01-18 15:34:22,716 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) [2022-01-18 15:34:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 13419 transitions. [2022-01-18 15:34:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:22,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:22,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:22,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:22,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:22,932 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1375739299, now seen corresponding path program 344 times [2022-01-18 15:34:22,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:22,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073475168] [2022-01-18 15:34:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:22,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:23,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:23,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073475168] [2022-01-18 15:34:23,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073475168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:23,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434352096] [2022-01-18 15:34:23,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:23,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:23,091 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) [2022-01-18 15:34:23,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 15:34:23,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:23,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:34:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:23,612 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 145 treesize of output 125 [2022-01-18 15:34:23,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:23,830 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 151 treesize of output 133 [2022-01-18 15:34:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:24,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:24,497 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 159 treesize of output 139 [2022-01-18 15:34:24,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:24,503 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 156 treesize of output 146 [2022-01-18 15:34:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:24,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434352096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:24,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:24,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:34:24,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798980442] [2022-01-18 15:34:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:24,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:34:24,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:34:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:24,878 INFO L87 Difference]: Start difference. First operand 3644 states and 13419 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) [2022-01-18 15:34:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:32,180 INFO L93 Difference]: Finished difference Result 6757 states and 22399 transitions. [2022-01-18 15:34:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-18 15:34:32,181 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 [2022-01-18 15:34:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:32,194 INFO L225 Difference]: With dead ends: 6757 [2022-01-18 15:34:32,194 INFO L226 Difference]: Without dead ends: 6320 [2022-01-18 15:34:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8318 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1836, Invalid=21420, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 15:34:32,197 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 481 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 4746 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 4966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 4746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:32,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1970 Invalid, 4966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 4746 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:34:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2022-01-18 15:34:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 3788. [2022-01-18 15:34:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 3.7206231845788222) internal successors, (14090), 3787 states have internal predecessors, (14090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 14090 transitions. [2022-01-18 15:34:32,315 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 14090 transitions. Word has length 23 [2022-01-18 15:34:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:32,315 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 14090 transitions. [2022-01-18 15:34:32,316 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) [2022-01-18 15:34:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 14090 transitions. [2022-01-18 15:34:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:32,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:32,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:32,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:32,539 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -474758263, now seen corresponding path program 345 times [2022-01-18 15:34:32,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:32,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65482373] [2022-01-18 15:34:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:32,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:32,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65482373] [2022-01-18 15:34:32,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65482373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641723861] [2022-01-18 15:34:32,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:32,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:32,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:32,704 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) [2022-01-18 15:34:32,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 15:34:33,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:33,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 234 [2022-01-18 15:34:33,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:33,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 131 [2022-01-18 15:34:33,800 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 129 treesize of output 113 [2022-01-18 15:34:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:34,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:34,274 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 247 treesize of output 219 [2022-01-18 15:34:34,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:34,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 227 [2022-01-18 15:34:34,575 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 192 treesize of output 172 [2022-01-18 15:34:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:34,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641723861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:34,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:34,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-01-18 15:34:34,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064583722] [2022-01-18 15:34:34,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:34,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:34:34,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:34:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:34,698 INFO L87 Difference]: Start difference. First operand 3788 states and 14090 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) [2022-01-18 15:34:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:36,895 INFO L93 Difference]: Finished difference Result 4946 states and 17346 transitions. [2022-01-18 15:34:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 15:34:36,895 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 [2022-01-18 15:34:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:36,905 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 15:34:36,905 INFO L226 Difference]: Without dead ends: 4784 [2022-01-18 15:34:36,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=593, Invalid=5413, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:34:36,906 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 289 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:36,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 957 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2519 Invalid, 0 Unknown, 386 Unchecked, 0.8s Time] [2022-01-18 15:34:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4784 states. [2022-01-18 15:34:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4784 to 3784. [2022-01-18 15:34:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 3.7195347607718743) internal successors, (14071), 3783 states have internal predecessors, (14071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 14071 transitions. [2022-01-18 15:34:36,974 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 14071 transitions. Word has length 23 [2022-01-18 15:34:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:36,974 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 14071 transitions. [2022-01-18 15:34:36,975 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) [2022-01-18 15:34:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 14071 transitions. [2022-01-18 15:34:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:36,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:36,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:36,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:37,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:37,197 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 17837499, now seen corresponding path program 346 times [2022-01-18 15:34:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:37,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777822625] [2022-01-18 15:34:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:37,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:37,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777822625] [2022-01-18 15:34:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777822625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352157570] [2022-01-18 15:34:37,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:37,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:37,310 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) [2022-01-18 15:34:37,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 15:34:37,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:37,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:37,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:37,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:37,770 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 145 treesize of output 125 [2022-01-18 15:34:38,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 235 [2022-01-18 15:34:38,034 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 211 treesize of output 181 [2022-01-18 15:34:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:38,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:38,337 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 142 treesize of output 126 [2022-01-18 15:34:38,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:38,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:38,547 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 152 treesize of output 142 [2022-01-18 15:34:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:38,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352157570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:38,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:38,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-01-18 15:34:38,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566272831] [2022-01-18 15:34:38,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:38,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:34:38,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:34:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:38,862 INFO L87 Difference]: Start difference. First operand 3784 states and 14071 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:34:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:40,110 INFO L93 Difference]: Finished difference Result 4872 states and 17052 transitions. [2022-01-18 15:34:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:34:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 [2022-01-18 15:34:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:40,119 INFO L225 Difference]: With dead ends: 4872 [2022-01-18 15:34:40,119 INFO L226 Difference]: Without dead ends: 4724 [2022-01-18 15:34:40,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=2774, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:34:40,120 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 181 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:40,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 804 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:34:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2022-01-18 15:34:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3783. [2022-01-18 15:34:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 3.7207826546800633) internal successors, (14072), 3782 states have internal predecessors, (14072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 14072 transitions. [2022-01-18 15:34:40,173 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 14072 transitions. Word has length 23 [2022-01-18 15:34:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 3783 states and 14072 transitions. [2022-01-18 15:34:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:34:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 14072 transitions. [2022-01-18 15:34:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:40,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:40,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:40,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:40,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:40,387 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 248580775, now seen corresponding path program 347 times [2022-01-18 15:34:40,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:40,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227645614] [2022-01-18 15:34:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:40,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227645614] [2022-01-18 15:34:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227645614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396977471] [2022-01-18 15:34:40,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:40,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:40,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:40,488 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) [2022-01-18 15:34:40,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 15:34:40,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:40,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:40,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:40,994 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 165 treesize of output 147 [2022-01-18 15:34:41,146 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 203 treesize of output 173 [2022-01-18 15:34:41,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:41,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:41,540 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 230 treesize of output 210 [2022-01-18 15:34:41,823 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 325 treesize of output 281 [2022-01-18 15:34:41,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:41,830 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 258 [2022-01-18 15:34:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:42,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396977471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:42,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:42,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:34:42,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522969272] [2022-01-18 15:34:42,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:42,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:34:42,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:34:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:42,255 INFO L87 Difference]: Start difference. First operand 3783 states and 14072 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) [2022-01-18 15:34:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:45,665 INFO L93 Difference]: Finished difference Result 6586 states and 22486 transitions. [2022-01-18 15:34:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 15:34:45,665 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 [2022-01-18 15:34:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:45,675 INFO L225 Difference]: With dead ends: 6586 [2022-01-18 15:34:45,676 INFO L226 Difference]: Without dead ends: 6200 [2022-01-18 15:34:45,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=897, Invalid=9003, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 15:34:45,676 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 384 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 3431 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:45,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1042 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3431 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:34:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2022-01-18 15:34:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 3902. [2022-01-18 15:34:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3902 states, 3901 states have (on average 3.7495513970776724) internal successors, (14627), 3901 states have internal predecessors, (14627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 14627 transitions. [2022-01-18 15:34:45,743 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 14627 transitions. Word has length 23 [2022-01-18 15:34:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:45,743 INFO L470 AbstractCegarLoop]: Abstraction has 3902 states and 14627 transitions. [2022-01-18 15:34:45,743 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) [2022-01-18 15:34:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 14627 transitions. [2022-01-18 15:34:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:45,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:45,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:45,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-01-18 15:34:45,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:45,965 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1642425667, now seen corresponding path program 348 times [2022-01-18 15:34:45,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:45,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378984901] [2022-01-18 15:34:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:45,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:46,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378984901] [2022-01-18 15:34:46,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378984901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138003488] [2022-01-18 15:34:46,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:46,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:46,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:46,036 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) [2022-01-18 15:34:46,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 15:34:46,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:46,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:34:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:46,505 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 226 treesize of output 206 [2022-01-18 15:34:47,054 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 173 treesize of output 149 [2022-01-18 15:34:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:47,072 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 168 treesize of output 148 [2022-01-18 15:34:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:47,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:47,640 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 197 treesize of output 177 [2022-01-18 15:34:47,911 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 159 treesize of output 139 [2022-01-18 15:34:47,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:47,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:34:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:48,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138003488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:48,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:48,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:34:48,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52681426] [2022-01-18 15:34:48,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:48,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:34:48,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:34:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:34:48,081 INFO L87 Difference]: Start difference. First operand 3902 states and 14627 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) [2022-01-18 15:34:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:48,705 INFO L93 Difference]: Finished difference Result 5108 states and 18231 transitions. [2022-01-18 15:34:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:34:48,705 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 23 [2022-01-18 15:34:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:48,713 INFO L225 Difference]: With dead ends: 5108 [2022-01-18 15:34:48,714 INFO L226 Difference]: Without dead ends: 4941 [2022-01-18 15:34:48,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:34:48,714 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 160 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:48,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 417 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1012 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-01-18 15:34:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4941 states. [2022-01-18 15:34:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4941 to 4047. [2022-01-18 15:34:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 3.7694018783984182) internal successors, (15251), 4046 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 15251 transitions. [2022-01-18 15:34:48,771 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 15251 transitions. Word has length 23 [2022-01-18 15:34:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:48,771 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 15251 transitions. [2022-01-18 15:34:48,771 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) [2022-01-18 15:34:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 15251 transitions. [2022-01-18 15:34:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:48,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:48,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:48,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:48,993 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,SelfDestructingSolverStorable364 [2022-01-18 15:34:48,993 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2142229317, now seen corresponding path program 349 times [2022-01-18 15:34:48,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:48,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931034547] [2022-01-18 15:34:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:48,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:49,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:49,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931034547] [2022-01-18 15:34:49,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931034547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:49,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433380058] [2022-01-18 15:34:49,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:49,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:49,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:49,142 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) [2022-01-18 15:34:49,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 15:34:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:49,743 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 250 treesize of output 216 [2022-01-18 15:34:49,978 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 186 treesize of output 160 [2022-01-18 15:34:49,980 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 136 treesize of output 122 [2022-01-18 15:34:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:50,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:50,239 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 171 treesize of output 151 [2022-01-18 15:34:50,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:50,471 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 213 treesize of output 195 [2022-01-18 15:34:50,475 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 186 treesize of output 166 [2022-01-18 15:34:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:50,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433380058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:50,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:50,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 15:34:50,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213333811] [2022-01-18 15:34:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:50,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:34:50,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:34:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:34:50,693 INFO L87 Difference]: Start difference. First operand 4047 states and 15251 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) [2022-01-18 15:34:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:54,247 INFO L93 Difference]: Finished difference Result 6070 states and 21267 transitions. [2022-01-18 15:34:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 15:34:54,247 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 [2022-01-18 15:34:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:54,258 INFO L225 Difference]: With dead ends: 6070 [2022-01-18 15:34:54,258 INFO L226 Difference]: Without dead ends: 5864 [2022-01-18 15:34:54,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=682, Invalid=7874, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 15:34:54,259 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 323 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 4573 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 4699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:54,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1322 Invalid, 4699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4573 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:34:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5864 states. [2022-01-18 15:34:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5864 to 3990. [2022-01-18 15:34:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 3.760090248182502) internal successors, (14999), 3989 states have internal predecessors, (14999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 14999 transitions. [2022-01-18 15:34:54,324 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 14999 transitions. Word has length 23 [2022-01-18 15:34:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:54,324 INFO L470 AbstractCegarLoop]: Abstraction has 3990 states and 14999 transitions. [2022-01-18 15:34:54,324 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) [2022-01-18 15:34:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 14999 transitions. [2022-01-18 15:34:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:54,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:54,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:54,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:54,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:54,534 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:54,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1699320593, now seen corresponding path program 350 times [2022-01-18 15:34:54,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:54,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512999614] [2022-01-18 15:34:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:54,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:54,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512999614] [2022-01-18 15:34:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512999614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381751748] [2022-01-18 15:34:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:54,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:54,660 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) [2022-01-18 15:34:54,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 15:34:55,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:55,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:55,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 251 [2022-01-18 15:34:55,528 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 246 treesize of output 210 [2022-01-18 15:34:55,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:34:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:55,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:55,997 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 291 treesize of output 259 [2022-01-18 15:34:56,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:34:56,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 246 [2022-01-18 15:34:56,353 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 237 treesize of output 209 [2022-01-18 15:34:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:56,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381751748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:56,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:56,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-01-18 15:34:56,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845872644] [2022-01-18 15:34:56,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:56,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:34:56,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:34:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:56,609 INFO L87 Difference]: Start difference. First operand 3990 states and 14999 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) [2022-01-18 15:34:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:57,564 INFO L93 Difference]: Finished difference Result 5637 states and 20044 transitions. [2022-01-18 15:34:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:34:57,564 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 [2022-01-18 15:34:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:57,575 INFO L225 Difference]: With dead ends: 5637 [2022-01-18 15:34:57,575 INFO L226 Difference]: Without dead ends: 5511 [2022-01-18 15:34:57,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:34:57,575 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 275 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:57,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 404 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:34:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2022-01-18 15:34:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 4003. [2022-01-18 15:34:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 3.7648675662168913) internal successors, (15067), 4002 states have internal predecessors, (15067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 15067 transitions. [2022-01-18 15:34:57,647 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 15067 transitions. Word has length 23 [2022-01-18 15:34:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:57,647 INFO L470 AbstractCegarLoop]: Abstraction has 4003 states and 15067 transitions. [2022-01-18 15:34:57,647 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) [2022-01-18 15:34:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 15067 transitions. [2022-01-18 15:34:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:34:57,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:57,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:57,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:57,867 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,SelfDestructingSolverStorable366 [2022-01-18 15:34:57,867 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:34:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash -377508711, now seen corresponding path program 351 times [2022-01-18 15:34:57,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:57,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414190597] [2022-01-18 15:34:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:57,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:34:57,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414190597] [2022-01-18 15:34:57,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414190597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332631574] [2022-01-18 15:34:57,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:57,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:57,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:57,980 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) [2022-01-18 15:34:57,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 15:34:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:34:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:58,785 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 349 treesize of output 289 [2022-01-18 15:34:59,239 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 174 treesize of output 152 [2022-01-18 15:34:59,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 149 [2022-01-18 15:34:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:59,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:00,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:00,070 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 322 treesize of output 292 [2022-01-18 15:35:00,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:00,284 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 51 treesize of output 49 [2022-01-18 15:35:00,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:00,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-01-18 15:35:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:00,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332631574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:00,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:00,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 31 [2022-01-18 15:35:00,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833844729] [2022-01-18 15:35:00,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:00,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:35:00,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:35:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:35:00,439 INFO L87 Difference]: Start difference. First operand 4003 states and 15067 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 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) [2022-01-18 15:35:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:03,156 INFO L93 Difference]: Finished difference Result 5518 states and 19490 transitions. [2022-01-18 15:35:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:35:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 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 [2022-01-18 15:35:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:03,165 INFO L225 Difference]: With dead ends: 5518 [2022-01-18 15:35:03,165 INFO L226 Difference]: Without dead ends: 5340 [2022-01-18 15:35:03,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=320, Invalid=3340, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:35:03,166 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 197 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:03,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 852 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:35:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2022-01-18 15:35:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 4016. [2022-01-18 15:35:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4016 states, 4015 states have (on average 3.766625155666252) internal successors, (15123), 4015 states have internal predecessors, (15123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4016 states to 4016 states and 15123 transitions. [2022-01-18 15:35:03,226 INFO L78 Accepts]: Start accepts. Automaton has 4016 states and 15123 transitions. Word has length 23 [2022-01-18 15:35:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:03,226 INFO L470 AbstractCegarLoop]: Abstraction has 4016 states and 15123 transitions. [2022-01-18 15:35:03,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 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) [2022-01-18 15:35:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4016 states and 15123 transitions. [2022-01-18 15:35:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:03,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:03,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:03,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:03,436 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,SelfDestructingSolverStorable367 [2022-01-18 15:35:03,436 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1404785959, now seen corresponding path program 352 times [2022-01-18 15:35:03,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:03,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801403055] [2022-01-18 15:35:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:03,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:03,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801403055] [2022-01-18 15:35:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801403055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458951422] [2022-01-18 15:35:03,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:03,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:03,536 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) [2022-01-18 15:35:03,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 15:35:03,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:03,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:03,991 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 173 treesize of output 149 [2022-01-18 15:35:04,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:04,503 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 321 treesize of output 267 [2022-01-18 15:35:04,507 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 241 treesize of output 213 [2022-01-18 15:35:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:04,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:04,802 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 142 treesize of output 126 [2022-01-18 15:35:05,007 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 159 treesize of output 139 [2022-01-18 15:35:05,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:05,014 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 152 treesize of output 142 [2022-01-18 15:35:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:05,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458951422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:05,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:05,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:35:05,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790620424] [2022-01-18 15:35:05,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:05,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:35:05,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:35:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:35:05,351 INFO L87 Difference]: Start difference. First operand 4016 states and 15123 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) [2022-01-18 15:35:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:05,603 INFO L93 Difference]: Finished difference Result 4667 states and 16970 transitions. [2022-01-18 15:35:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:35:05,604 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 23 [2022-01-18 15:35:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:05,611 INFO L225 Difference]: With dead ends: 4667 [2022-01-18 15:35:05,611 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 15:35:05,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:05,612 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:05,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 179 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-01-18 15:35:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 15:35:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4029. [2022-01-18 15:35:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 4028 states have (on average 3.769364448857994) internal successors, (15183), 4028 states have internal predecessors, (15183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 15183 transitions. [2022-01-18 15:35:05,669 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 15183 transitions. Word has length 23 [2022-01-18 15:35:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:05,669 INFO L470 AbstractCegarLoop]: Abstraction has 4029 states and 15183 transitions. [2022-01-18 15:35:05,669 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) [2022-01-18 15:35:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 15183 transitions. [2022-01-18 15:35:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:05,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:05,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:05,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:05,879 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,SelfDestructingSolverStorable368 [2022-01-18 15:35:05,879 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash -95709379, now seen corresponding path program 353 times [2022-01-18 15:35:05,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:05,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430423978] [2022-01-18 15:35:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:05,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:05,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:05,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430423978] [2022-01-18 15:35:05,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430423978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:05,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586052222] [2022-01-18 15:35:05,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:35:05,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:05,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:05,992 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) [2022-01-18 15:35:05,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-18 15:35:06,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:35:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:06,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:06,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:06,461 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 173 treesize of output 149 [2022-01-18 15:35:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:06,964 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 188 treesize of output 162 [2022-01-18 15:35:06,966 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 136 treesize of output 122 [2022-01-18 15:35:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:07,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:07,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:07,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:07,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:35:07,662 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 177 treesize of output 157 [2022-01-18 15:35:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586052222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:07,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:07,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:35:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711196028] [2022-01-18 15:35:07,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:07,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:07,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:07,960 INFO L87 Difference]: Start difference. First operand 4029 states and 15183 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) [2022-01-18 15:35:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:08,390 INFO L93 Difference]: Finished difference Result 4784 states and 17305 transitions. [2022-01-18 15:35:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:35:08,390 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 [2022-01-18 15:35:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:08,398 INFO L225 Difference]: With dead ends: 4784 [2022-01-18 15:35:08,398 INFO L226 Difference]: Without dead ends: 4735 [2022-01-18 15:35:08,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:08,398 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:08,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 361 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 796 Invalid, 0 Unknown, 389 Unchecked, 0.3s Time] [2022-01-18 15:35:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2022-01-18 15:35:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3999. [2022-01-18 15:35:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3998 states have (on average 3.7643821910955477) internal successors, (15050), 3998 states have internal predecessors, (15050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 15050 transitions. [2022-01-18 15:35:08,453 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 15050 transitions. Word has length 23 [2022-01-18 15:35:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:08,453 INFO L470 AbstractCegarLoop]: Abstraction has 3999 states and 15050 transitions. [2022-01-18 15:35:08,453 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) [2022-01-18 15:35:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 15050 transitions. [2022-01-18 15:35:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:08,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:08,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:08,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:08,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:08,661 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:08,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1914196129, now seen corresponding path program 354 times [2022-01-18 15:35:08,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:08,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799235600] [2022-01-18 15:35:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:08,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:08,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:08,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799235600] [2022-01-18 15:35:08,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799235600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:08,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649419739] [2022-01-18 15:35:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:08,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:08,831 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) [2022-01-18 15:35:08,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-18 15:35:09,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:35:09,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:09,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:09,713 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 292 treesize of output 260 [2022-01-18 15:35:09,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:09,717 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 226 [2022-01-18 15:35:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:10,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:10,281 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 159 treesize of output 139 [2022-01-18 15:35:10,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:10,700 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 350 treesize of output 312 [2022-01-18 15:35:10,704 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 278 treesize of output 240 [2022-01-18 15:35:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:10,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649419739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:10,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:10,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:35:10,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21814945] [2022-01-18 15:35:10,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:10,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:35:10,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:35:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:35:10,883 INFO L87 Difference]: Start difference. First operand 3999 states and 15050 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) [2022-01-18 15:35:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:11,580 INFO L93 Difference]: Finished difference Result 5004 states and 18248 transitions. [2022-01-18 15:35:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:35:11,580 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 [2022-01-18 15:35:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:11,589 INFO L225 Difference]: With dead ends: 5004 [2022-01-18 15:35:11,589 INFO L226 Difference]: Without dead ends: 4855 [2022-01-18 15:35:11,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:35:11,589 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 232 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:11,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 305 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 930 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-01-18 15:35:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2022-01-18 15:35:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4067. [2022-01-18 15:35:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4067 states, 4066 states have (on average 3.7717658632562716) internal successors, (15336), 4066 states have internal predecessors, (15336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4067 states to 4067 states and 15336 transitions. [2022-01-18 15:35:11,646 INFO L78 Accepts]: Start accepts. Automaton has 4067 states and 15336 transitions. Word has length 23 [2022-01-18 15:35:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 4067 states and 15336 transitions. [2022-01-18 15:35:11,647 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) [2022-01-18 15:35:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4067 states and 15336 transitions. [2022-01-18 15:35:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:11,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:11,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:11,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:11,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:11,867 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash -886168203, now seen corresponding path program 355 times [2022-01-18 15:35:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:11,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001589166] [2022-01-18 15:35:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:11,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:12,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:12,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001589166] [2022-01-18 15:35:12,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001589166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:12,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973246021] [2022-01-18 15:35:12,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:12,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:12,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:12,008 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) [2022-01-18 15:35:12,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-01-18 15:35:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:12,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:12,566 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 250 treesize of output 222 [2022-01-18 15:35:12,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:12,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:13,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:13,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:13,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:13,772 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 248 treesize of output 226 [2022-01-18 15:35:13,777 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 192 treesize of output 172 [2022-01-18 15:35:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973246021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:13,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:13,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:35:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237736086] [2022-01-18 15:35:13,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:13,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:13,934 INFO L87 Difference]: Start difference. First operand 4067 states and 15336 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) [2022-01-18 15:35:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:19,010 INFO L93 Difference]: Finished difference Result 7344 states and 25285 transitions. [2022-01-18 15:35:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 15:35:19,010 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 23 [2022-01-18 15:35:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:19,027 INFO L225 Difference]: With dead ends: 7344 [2022-01-18 15:35:19,028 INFO L226 Difference]: Without dead ends: 6838 [2022-01-18 15:35:19,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1034, Invalid=10956, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 15:35:19,029 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 374 mSDsluCounter, 2889 mSDsCounter, 0 mSdLazyCounter, 4898 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 5077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 4898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:19,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1529 Invalid, 5077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 4898 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:35:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2022-01-18 15:35:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 4271. [2022-01-18 15:35:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.780327868852459) internal successors, (16142), 4270 states have internal predecessors, (16142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 16142 transitions. [2022-01-18 15:35:19,143 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 16142 transitions. Word has length 23 [2022-01-18 15:35:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:19,143 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 16142 transitions. [2022-01-18 15:35:19,143 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) [2022-01-18 15:35:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 16142 transitions. [2022-01-18 15:35:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:19,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:19,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:19,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:19,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:19,355 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1853710315, now seen corresponding path program 356 times [2022-01-18 15:35:19,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:19,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821196134] [2022-01-18 15:35:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:19,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:19,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821196134] [2022-01-18 15:35:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821196134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720371847] [2022-01-18 15:35:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:19,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:19,464 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) [2022-01-18 15:35:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-01-18 15:35:19,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:19,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:19,958 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 148 treesize of output 128 [2022-01-18 15:35:20,091 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 165 treesize of output 141 [2022-01-18 15:35:20,094 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 153 treesize of output 133 [2022-01-18 15:35:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:20,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:20,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:20,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:20,961 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 224 [2022-01-18 15:35:20,965 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 192 treesize of output 172 [2022-01-18 15:35:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:21,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720371847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:21,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:21,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:35:21,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233286324] [2022-01-18 15:35:21,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:21,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:21,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:21,208 INFO L87 Difference]: Start difference. First operand 4271 states and 16142 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) [2022-01-18 15:35:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:24,303 INFO L93 Difference]: Finished difference Result 6159 states and 22048 transitions. [2022-01-18 15:35:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:35:24,303 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 23 [2022-01-18 15:35:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:24,319 INFO L225 Difference]: With dead ends: 6159 [2022-01-18 15:35:24,319 INFO L226 Difference]: Without dead ends: 5870 [2022-01-18 15:35:24,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=667, Invalid=6643, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 15:35:24,320 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 338 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 3628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:24,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 969 Invalid, 3628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3508 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:35:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5870 states. [2022-01-18 15:35:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5870 to 4310. [2022-01-18 15:35:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4310 states, 4309 states have (on average 3.79136690647482) internal successors, (16337), 4309 states have internal predecessors, (16337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 16337 transitions. [2022-01-18 15:35:24,428 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 16337 transitions. Word has length 23 [2022-01-18 15:35:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:24,428 INFO L470 AbstractCegarLoop]: Abstraction has 4310 states and 16337 transitions. [2022-01-18 15:35:24,428 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) [2022-01-18 15:35:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 16337 transitions. [2022-01-18 15:35:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:24,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:24,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:24,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-01-18 15:35:24,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:24,640 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1746565983, now seen corresponding path program 357 times [2022-01-18 15:35:24,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:24,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523824341] [2022-01-18 15:35:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:24,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:24,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:24,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523824341] [2022-01-18 15:35:24,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523824341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:24,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648837901] [2022-01-18 15:35:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:24,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:24,839 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) [2022-01-18 15:35:24,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-01-18 15:35:25,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:35:25,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:25,474 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 222 treesize of output 188 [2022-01-18 15:35:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:25,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 191 [2022-01-18 15:35:25,763 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 189 treesize of output 161 [2022-01-18 15:35:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:25,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:26,285 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 [2022-01-18 15:35:26,710 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 222 treesize of output 190 [2022-01-18 15:35:26,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:26,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 199 [2022-01-18 15:35:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:27,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648837901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:27,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:27,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 15:35:27,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787806721] [2022-01-18 15:35:27,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:27,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:35:27,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:35:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:27,012 INFO L87 Difference]: Start difference. First operand 4310 states and 16337 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) [2022-01-18 15:35:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:31,304 INFO L93 Difference]: Finished difference Result 6486 states and 22792 transitions. [2022-01-18 15:35:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 15:35:31,304 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 [2022-01-18 15:35:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:31,322 INFO L225 Difference]: With dead ends: 6486 [2022-01-18 15:35:31,322 INFO L226 Difference]: Without dead ends: 6243 [2022-01-18 15:35:31,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=826, Invalid=7364, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 15:35:31,323 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 250 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:31,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 879 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2568 Invalid, 0 Unknown, 351 Unchecked, 1.1s Time] [2022-01-18 15:35:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2022-01-18 15:35:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 4337. [2022-01-18 15:35:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 4336 states have (on average 3.79820110701107) internal successors, (16469), 4336 states have internal predecessors, (16469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 16469 transitions. [2022-01-18 15:35:31,414 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 16469 transitions. Word has length 23 [2022-01-18 15:35:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:31,414 INFO L470 AbstractCegarLoop]: Abstraction has 4337 states and 16469 transitions. [2022-01-18 15:35:31,414 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) [2022-01-18 15:35:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 16469 transitions. [2022-01-18 15:35:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:31,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:31,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:31,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:31,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:31,635 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -803531407, now seen corresponding path program 358 times [2022-01-18 15:35:31,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:31,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741086482] [2022-01-18 15:35:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:31,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:31,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741086482] [2022-01-18 15:35:31,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741086482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73780090] [2022-01-18 15:35:31,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:31,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:31,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:31,834 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) [2022-01-18 15:35:31,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-01-18 15:35:32,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:32,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:32,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:32,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:32,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:32,773 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 158 treesize of output 138 [2022-01-18 15:35:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:32,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:33,166 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 216 treesize of output 196 [2022-01-18 15:35:33,474 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 235 treesize of output 207 [2022-01-18 15:35:33,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:33,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:35:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:35:33,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73780090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:33,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:33,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:35:33,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247227601] [2022-01-18 15:35:33,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:33,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:33,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:33,694 INFO L87 Difference]: Start difference. First operand 4337 states and 16469 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) [2022-01-18 15:35:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:36,184 INFO L93 Difference]: Finished difference Result 5772 states and 20667 transitions. [2022-01-18 15:35:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:35:36,184 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 23 [2022-01-18 15:35:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:36,199 INFO L225 Difference]: With dead ends: 5772 [2022-01-18 15:35:36,199 INFO L226 Difference]: Without dead ends: 5521 [2022-01-18 15:35:36,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=592, Invalid=6214, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:35:36,200 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 286 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:36,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 939 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:35:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2022-01-18 15:35:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4340. [2022-01-18 15:35:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 4339 states have (on average 3.802489052777138) internal successors, (16499), 4339 states have internal predecessors, (16499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 16499 transitions. [2022-01-18 15:35:36,304 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 16499 transitions. Word has length 23 [2022-01-18 15:35:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:36,304 INFO L470 AbstractCegarLoop]: Abstraction has 4340 states and 16499 transitions. [2022-01-18 15:35:36,304 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) [2022-01-18 15:35:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 16499 transitions. [2022-01-18 15:35:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:36,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:36,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:36,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:36,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:36,527 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash -536481559, now seen corresponding path program 359 times [2022-01-18 15:35:36,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:36,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716017567] [2022-01-18 15:35:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:36,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:36,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:36,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716017567] [2022-01-18 15:35:36,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716017567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:36,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385446574] [2022-01-18 15:35:36,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:35:36,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:36,758 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) [2022-01-18 15:35:36,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-01-18 15:35:37,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:35:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:37,412 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 218 treesize of output 198 [2022-01-18 15:35:37,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:37,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 241 treesize of output 201 [2022-01-18 15:35:37,802 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 193 treesize of output 167 [2022-01-18 15:35:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:38,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:38,395 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 310 treesize of output 270 [2022-01-18 15:35:38,787 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 188 treesize of output 164 [2022-01-18 15:35:38,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:38,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:35:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:39,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385446574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:39,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:39,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-01-18 15:35:39,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773762483] [2022-01-18 15:35:39,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:39,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:35:39,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:35:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:35:39,021 INFO L87 Difference]: Start difference. First operand 4340 states and 16499 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) [2022-01-18 15:35:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:43,650 INFO L93 Difference]: Finished difference Result 6363 states and 22788 transitions. [2022-01-18 15:35:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 15:35:43,650 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 [2022-01-18 15:35:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:43,667 INFO L225 Difference]: With dead ends: 6363 [2022-01-18 15:35:43,667 INFO L226 Difference]: Without dead ends: 6192 [2022-01-18 15:35:43,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=799, Invalid=9301, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 15:35:43,668 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 247 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:43,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 1227 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3218 Invalid, 0 Unknown, 244 Unchecked, 1.3s Time] [2022-01-18 15:35:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2022-01-18 15:35:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 4429. [2022-01-18 15:35:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 3.835140018066847) internal successors, (16982), 4428 states have internal predecessors, (16982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 16982 transitions. [2022-01-18 15:35:43,774 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 16982 transitions. Word has length 23 [2022-01-18 15:35:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:43,774 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 16982 transitions. [2022-01-18 15:35:43,774 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) [2022-01-18 15:35:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 16982 transitions. [2022-01-18 15:35:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:43,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:43,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:43,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:43,985 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,SelfDestructingSolverStorable375 [2022-01-18 15:35:43,986 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1563236265, now seen corresponding path program 360 times [2022-01-18 15:35:43,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842047166] [2022-01-18 15:35:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:43,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:44,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842047166] [2022-01-18 15:35:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842047166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856040286] [2022-01-18 15:35:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:44,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:44,114 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) [2022-01-18 15:35:44,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-01-18 15:35:44,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:35:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:44,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:45,014 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 176 [2022-01-18 15:35:45,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:45,018 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 166 [2022-01-18 15:35:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:45,434 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 188 treesize of output 168 [2022-01-18 15:35:45,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:45,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 259 [2022-01-18 15:35:45,968 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 226 treesize of output 194 [2022-01-18 15:35:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:46,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856040286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:46,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:46,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:35:46,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610342881] [2022-01-18 15:35:46,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:46,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:35:46,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:35:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:35:46,302 INFO L87 Difference]: Start difference. First operand 4429 states and 16982 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) [2022-01-18 15:35:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:47,423 INFO L93 Difference]: Finished difference Result 5674 states and 20858 transitions. [2022-01-18 15:35:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:47,423 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 [2022-01-18 15:35:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:47,437 INFO L225 Difference]: With dead ends: 5674 [2022-01-18 15:35:47,437 INFO L226 Difference]: Without dead ends: 5574 [2022-01-18 15:35:47,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:35:47,438 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 265 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:47,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 423 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1246 Invalid, 0 Unknown, 129 Unchecked, 0.5s Time] [2022-01-18 15:35:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2022-01-18 15:35:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 4425. [2022-01-18 15:35:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4424 states have (on average 3.8270795660036168) internal successors, (16931), 4424 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 16931 transitions. [2022-01-18 15:35:47,522 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 16931 transitions. Word has length 23 [2022-01-18 15:35:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:47,522 INFO L470 AbstractCegarLoop]: Abstraction has 4425 states and 16931 transitions. [2022-01-18 15:35:47,522 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) [2022-01-18 15:35:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 16931 transitions. [2022-01-18 15:35:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:47,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:47,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:47,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:47,745 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,SelfDestructingSolverStorable376 [2022-01-18 15:35:47,746 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1017803113, now seen corresponding path program 361 times [2022-01-18 15:35:47,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:47,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602811230] [2022-01-18 15:35:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:47,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:47,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602811230] [2022-01-18 15:35:47,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602811230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917035729] [2022-01-18 15:35:47,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:47,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:47,969 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) [2022-01-18 15:35:47,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-01-18 15:35:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:35:48,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:48,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 206 [2022-01-18 15:35:48,741 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 237 treesize of output 199 [2022-01-18 15:35:48,744 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 228 treesize of output 198 [2022-01-18 15:35:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:49,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:49,745 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 188 treesize of output 164 [2022-01-18 15:35:50,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:50,050 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 194 [2022-01-18 15:35:50,054 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 179 treesize of output 159 [2022-01-18 15:35:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:50,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917035729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:50,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:50,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-01-18 15:35:50,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811101450] [2022-01-18 15:35:50,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:50,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:50,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:50,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:50,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:50,478 INFO L87 Difference]: Start difference. First operand 4425 states and 16931 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) [2022-01-18 15:35:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:53,309 INFO L93 Difference]: Finished difference Result 6414 states and 22933 transitions. [2022-01-18 15:35:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:35:53,309 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 [2022-01-18 15:35:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:53,322 INFO L225 Difference]: With dead ends: 6414 [2022-01-18 15:35:53,322 INFO L226 Difference]: Without dead ends: 6132 [2022-01-18 15:35:53,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=595, Invalid=4235, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:35:53,323 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 288 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:53,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 857 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:35:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6132 states. [2022-01-18 15:35:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6132 to 4342. [2022-01-18 15:35:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 3.811333794056669) internal successors, (16545), 4341 states have internal predecessors, (16545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 16545 transitions. [2022-01-18 15:35:53,402 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 16545 transitions. Word has length 23 [2022-01-18 15:35:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:53,403 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 16545 transitions. [2022-01-18 15:35:53,403 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) [2022-01-18 15:35:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 16545 transitions. [2022-01-18 15:35:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:53,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:53,409 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:53,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:53,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-01-18 15:35:53,626 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:53,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1083448410, now seen corresponding path program 362 times [2022-01-18 15:35:53,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:53,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359376198] [2022-01-18 15:35:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:53,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:35:53,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359376198] [2022-01-18 15:35:53,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359376198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:53,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891302368] [2022-01-18 15:35:53,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:53,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:53,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:53,699 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) [2022-01-18 15:35:53,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-01-18 15:35:54,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:54,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 15:35:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:54,213 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 149 [2022-01-18 15:35:54,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:54,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:35:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 15:35:54,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:54,525 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 3 treesize of output 1 [2022-01-18 15:35:54,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:54,653 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 207 treesize of output 189 [2022-01-18 15:35:54,658 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 184 treesize of output 164 [2022-01-18 15:35:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 15:35:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891302368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:54,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:54,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-01-18 15:35:54,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85285836] [2022-01-18 15:35:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:54,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:35:54,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:35:54,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:35:54,918 INFO L87 Difference]: Start difference. First operand 4342 states and 16545 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) [2022-01-18 15:35:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:55,202 INFO L93 Difference]: Finished difference Result 4527 states and 17034 transitions. [2022-01-18 15:35:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:35:55,202 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 23 [2022-01-18 15:35:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:55,209 INFO L225 Difference]: With dead ends: 4527 [2022-01-18 15:35:55,209 INFO L226 Difference]: Without dead ends: 4396 [2022-01-18 15:35:55,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:55,209 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:55,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 127 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:35:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2022-01-18 15:35:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 4285. [2022-01-18 15:35:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4284 states have (on average 3.820494864612512) internal successors, (16367), 4284 states have internal predecessors, (16367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 16367 transitions. [2022-01-18 15:35:55,262 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 16367 transitions. Word has length 23 [2022-01-18 15:35:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:55,262 INFO L470 AbstractCegarLoop]: Abstraction has 4285 states and 16367 transitions. [2022-01-18 15:35:55,262 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) [2022-01-18 15:35:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 16367 transitions. [2022-01-18 15:35:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:55,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:55,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:55,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-01-18 15:35:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:55,483 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 727134229, now seen corresponding path program 363 times [2022-01-18 15:35:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622496466] [2022-01-18 15:35:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:55,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:55,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:55,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622496466] [2022-01-18 15:35:55,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622496466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:55,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894153792] [2022-01-18 15:35:55,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:55,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:55,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:55,609 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) [2022-01-18 15:35:55,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-01-18 15:35:55,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:35:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:56,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 322 [2022-01-18 15:35:56,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:56,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 382 treesize of output 320 [2022-01-18 15:35:56,625 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 286 treesize of output 258 [2022-01-18 15:35:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:56,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:57,119 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 222 treesize of output 190 [2022-01-18 15:35:57,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:35:57,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 292 [2022-01-18 15:35:57,456 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 283 treesize of output 243 [2022-01-18 15:35:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:57,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894153792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:57,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:57,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:35:57,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602047499] [2022-01-18 15:35:57,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:57,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:57,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:57,653 INFO L87 Difference]: Start difference. First operand 4285 states and 16367 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2022-01-18 15:35:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:58,333 INFO L93 Difference]: Finished difference Result 5356 states and 19776 transitions. [2022-01-18 15:35:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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 [2022-01-18 15:35:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:58,342 INFO L225 Difference]: With dead ends: 5356 [2022-01-18 15:35:58,342 INFO L226 Difference]: Without dead ends: 5098 [2022-01-18 15:35:58,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:35:58,342 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:58,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 323 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1093 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-01-18 15:35:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2022-01-18 15:35:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 4348. [2022-01-18 15:35:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 3.8461007591442375) internal successors, (16719), 4347 states have internal predecessors, (16719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 16719 transitions. [2022-01-18 15:35:58,404 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 16719 transitions. Word has length 23 [2022-01-18 15:35:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:58,404 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 16719 transitions. [2022-01-18 15:35:58,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2022-01-18 15:35:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 16719 transitions. [2022-01-18 15:35:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:35:58,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:58,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:58,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:58,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:58,621 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:35:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash -616597911, now seen corresponding path program 364 times [2022-01-18 15:35:58,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:58,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721362433] [2022-01-18 15:35:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:58,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:58,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721362433] [2022-01-18 15:35:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721362433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5501864] [2022-01-18 15:35:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:58,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:58,782 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) [2022-01-18 15:35:58,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-01-18 15:35:59,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:59,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:59,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:59,346 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 216 treesize of output 186 [2022-01-18 15:35:59,535 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 [2022-01-18 15:35:59,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:59,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 132 [2022-01-18 15:35:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:35:59,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:59,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:00,108 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 239 treesize of output 211 [2022-01-18 15:36:00,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:00,114 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 222 treesize of output 192 [2022-01-18 15:36:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:00,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5501864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:00,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:00,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-01-18 15:36:00,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497576306] [2022-01-18 15:36:00,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:00,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:36:00,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:36:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:00,318 INFO L87 Difference]: Start difference. First operand 4348 states and 16719 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) [2022-01-18 15:36:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:00,842 INFO L93 Difference]: Finished difference Result 5315 states and 19539 transitions. [2022-01-18 15:36:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:36:00,843 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 [2022-01-18 15:36:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:00,851 INFO L225 Difference]: With dead ends: 5315 [2022-01-18 15:36:00,851 INFO L226 Difference]: Without dead ends: 5193 [2022-01-18 15:36:00,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:36:00,852 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 195 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:00,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 314 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:36:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2022-01-18 15:36:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 4277. [2022-01-18 15:36:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4276 states have (on average 3.8395696913002806) internal successors, (16418), 4276 states have internal predecessors, (16418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 16418 transitions. [2022-01-18 15:36:00,913 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 16418 transitions. Word has length 23 [2022-01-18 15:36:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:00,913 INFO L470 AbstractCegarLoop]: Abstraction has 4277 states and 16418 transitions. [2022-01-18 15:36:00,913 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) [2022-01-18 15:36:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 16418 transitions. [2022-01-18 15:36:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:00,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:00,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:00,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:01,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:01,123 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash -652197237, now seen corresponding path program 365 times [2022-01-18 15:36:01,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82562497] [2022-01-18 15:36:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:01,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:01,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82562497] [2022-01-18 15:36:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82562497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883945735] [2022-01-18 15:36:01,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:01,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:01,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:01,381 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) [2022-01-18 15:36:01,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-01-18 15:36:01,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:36:01,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:36:01,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:01,955 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 309 treesize of output 281 [2022-01-18 15:36:02,259 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 125 [2022-01-18 15:36:02,261 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 152 treesize of output 132 [2022-01-18 15:36:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:02,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:02,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:03,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:03,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:36:03,321 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 179 treesize of output 159 [2022-01-18 15:36:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883945735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:03,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:03,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-01-18 15:36:03,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201428121] [2022-01-18 15:36:03,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:03,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:36:03,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:03,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:36:03,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:36:03,634 INFO L87 Difference]: Start difference. First operand 4277 states and 16418 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2022-01-18 15:36:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:11,732 INFO L93 Difference]: Finished difference Result 7822 states and 26588 transitions. [2022-01-18 15:36:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-18 15:36:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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 [2022-01-18 15:36:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:11,745 INFO L225 Difference]: With dead ends: 7822 [2022-01-18 15:36:11,745 INFO L226 Difference]: Without dead ends: 7277 [2022-01-18 15:36:11,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1997, Invalid=18025, Unknown=0, NotChecked=0, Total=20022 [2022-01-18 15:36:11,746 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 488 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 3783 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 3958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 3783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:11,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1349 Invalid, 3958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 3783 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:36:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7277 states. [2022-01-18 15:36:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7277 to 4443. [2022-01-18 15:36:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 3.875281404772625) internal successors, (17214), 4442 states have internal predecessors, (17214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 17214 transitions. [2022-01-18 15:36:11,822 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 17214 transitions. Word has length 23 [2022-01-18 15:36:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:11,822 INFO L470 AbstractCegarLoop]: Abstraction has 4443 states and 17214 transitions. [2022-01-18 15:36:11,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2022-01-18 15:36:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 17214 transitions. [2022-01-18 15:36:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:11,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:11,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:11,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-01-18 15:36:12,047 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,SelfDestructingSolverStorable381 [2022-01-18 15:36:12,047 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash 394486199, now seen corresponding path program 366 times [2022-01-18 15:36:12,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:12,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474923390] [2022-01-18 15:36:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:12,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:12,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474923390] [2022-01-18 15:36:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474923390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108210407] [2022-01-18 15:36:12,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:36:12,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:12,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:12,159 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) [2022-01-18 15:36:12,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-01-18 15:36:12,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:36:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:12,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:12,925 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 156 treesize of output 136 [2022-01-18 15:36:12,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:12,927 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 15:36:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:13,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:13,197 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 171 treesize of output 151 [2022-01-18 15:36:13,388 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 159 treesize of output 139 [2022-01-18 15:36:13,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:13,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 142 [2022-01-18 15:36:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:13,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108210407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:13,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:13,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:36:13,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857253988] [2022-01-18 15:36:13,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:13,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:13,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:13,611 INFO L87 Difference]: Start difference. First operand 4443 states and 17214 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) [2022-01-18 15:36:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:14,117 INFO L93 Difference]: Finished difference Result 5329 states and 19792 transitions. [2022-01-18 15:36:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:36:14,117 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 [2022-01-18 15:36:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:14,130 INFO L225 Difference]: With dead ends: 5329 [2022-01-18 15:36:14,131 INFO L226 Difference]: Without dead ends: 5213 [2022-01-18 15:36:14,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:36:14,131 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 146 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:14,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 435 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 860 Invalid, 0 Unknown, 321 Unchecked, 0.3s Time] [2022-01-18 15:36:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2022-01-18 15:36:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 4538. [2022-01-18 15:36:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4537 states have (on average 3.8750275512453163) internal successors, (17581), 4537 states have internal predecessors, (17581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 17581 transitions. [2022-01-18 15:36:14,207 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 17581 transitions. Word has length 23 [2022-01-18 15:36:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:14,207 INFO L470 AbstractCegarLoop]: Abstraction has 4538 states and 17581 transitions. [2022-01-18 15:36:14,207 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) [2022-01-18 15:36:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 17581 transitions. [2022-01-18 15:36:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:14,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:14,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:14,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:14,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:14,431 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1295456705, now seen corresponding path program 367 times [2022-01-18 15:36:14,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:14,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197092650] [2022-01-18 15:36:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:14,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:14,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197092650] [2022-01-18 15:36:14,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197092650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437924373] [2022-01-18 15:36:14,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:36:14,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:14,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:14,576 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) [2022-01-18 15:36:14,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-01-18 15:36:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:15,048 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 153 treesize of output 133 [2022-01-18 15:36:15,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:15,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:36:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:15,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:15,815 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 291 treesize of output 259 [2022-01-18 15:36:16,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:16,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:36:16,213 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 223 treesize of output 199 [2022-01-18 15:36:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:16,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437924373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:16,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:16,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:36:16,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506777785] [2022-01-18 15:36:16,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:16,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:16,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:16,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:16,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:16,513 INFO L87 Difference]: Start difference. First operand 4538 states and 17581 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) [2022-01-18 15:36:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:17,110 INFO L93 Difference]: Finished difference Result 5498 states and 20306 transitions. [2022-01-18 15:36:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:36:17,110 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 [2022-01-18 15:36:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:17,120 INFO L225 Difference]: With dead ends: 5498 [2022-01-18 15:36:17,120 INFO L226 Difference]: Without dead ends: 5414 [2022-01-18 15:36:17,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:36:17,121 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 198 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:17,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 382 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 340 Unchecked, 0.3s Time] [2022-01-18 15:36:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2022-01-18 15:36:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 4504. [2022-01-18 15:36:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4503 states have (on average 3.878081279147235) internal successors, (17463), 4503 states have internal predecessors, (17463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 17463 transitions. [2022-01-18 15:36:17,192 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 17463 transitions. Word has length 23 [2022-01-18 15:36:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:17,192 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 17463 transitions. [2022-01-18 15:36:17,192 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) [2022-01-18 15:36:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 17463 transitions. [2022-01-18 15:36:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:17,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:17,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:17,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:17,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:17,416 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1280973317, now seen corresponding path program 368 times [2022-01-18 15:36:17,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:17,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508800502] [2022-01-18 15:36:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:17,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:17,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:17,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508800502] [2022-01-18 15:36:17,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508800502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:17,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201840556] [2022-01-18 15:36:17,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:36:17,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:17,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:17,575 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) [2022-01-18 15:36:17,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-01-18 15:36:17,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:36:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:18,207 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 314 treesize of output 260 [2022-01-18 15:36:18,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:18,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 307 treesize of output 261 [2022-01-18 15:36:18,650 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 230 treesize of output 202 [2022-01-18 15:36:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:18,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:19,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:19,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:19,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 154 [2022-01-18 15:36:19,379 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 143 treesize of output 127 [2022-01-18 15:36:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:19,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201840556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:19,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:19,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 15:36:19,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345003076] [2022-01-18 15:36:19,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:19,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:36:19,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:36:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:36:19,564 INFO L87 Difference]: Start difference. First operand 4504 states and 17463 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) [2022-01-18 15:36:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:20,519 INFO L93 Difference]: Finished difference Result 5995 states and 22021 transitions. [2022-01-18 15:36:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:36:20,519 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 [2022-01-18 15:36:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:20,531 INFO L225 Difference]: With dead ends: 5995 [2022-01-18 15:36:20,531 INFO L226 Difference]: Without dead ends: 5865 [2022-01-18 15:36:20,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:36:20,531 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 241 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:20,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:36:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2022-01-18 15:36:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 4539. [2022-01-18 15:36:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.887615689731159) internal successors, (17642), 4538 states have internal predecessors, (17642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 17642 transitions. [2022-01-18 15:36:20,602 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 17642 transitions. Word has length 23 [2022-01-18 15:36:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:20,602 INFO L470 AbstractCegarLoop]: Abstraction has 4539 states and 17642 transitions. [2022-01-18 15:36:20,602 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) [2022-01-18 15:36:20,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 17642 transitions. [2022-01-18 15:36:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:20,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:20,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:20,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:20,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:20,810 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -414154477, now seen corresponding path program 369 times [2022-01-18 15:36:20,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:20,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662072103] [2022-01-18 15:36:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:20,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:36:21,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:21,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662072103] [2022-01-18 15:36:21,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662072103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:21,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048701470] [2022-01-18 15:36:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:36:21,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:21,004 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) [2022-01-18 15:36:21,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-01-18 15:36:21,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:36:21,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:21,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:21,801 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 171 treesize of output 147 [2022-01-18 15:36:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:21,804 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 159 treesize of output 139 [2022-01-18 15:36:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:36:21,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:22,219 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 281 treesize of output 245 [2022-01-18 15:36:22,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:22,550 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 326 treesize of output 284 [2022-01-18 15:36:22,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2022-01-18 15:36:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:36:22,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048701470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:22,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:22,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:36:22,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569373901] [2022-01-18 15:36:22,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:22,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:36:22,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:36:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:36:22,697 INFO L87 Difference]: Start difference. First operand 4539 states and 17642 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) [2022-01-18 15:36:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:23,114 INFO L93 Difference]: Finished difference Result 5204 states and 19738 transitions. [2022-01-18 15:36:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:36:23,115 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 [2022-01-18 15:36:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:23,123 INFO L225 Difference]: With dead ends: 5204 [2022-01-18 15:36:23,123 INFO L226 Difference]: Without dead ends: 5168 [2022-01-18 15:36:23,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:36:23,124 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 149 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:23,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 288 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 849 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-01-18 15:36:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2022-01-18 15:36:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 4542. [2022-01-18 15:36:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4541 states have (on average 3.8876899361374146) internal successors, (17654), 4541 states have internal predecessors, (17654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 17654 transitions. [2022-01-18 15:36:23,185 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 17654 transitions. Word has length 23 [2022-01-18 15:36:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 17654 transitions. [2022-01-18 15:36:23,185 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) [2022-01-18 15:36:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 17654 transitions. [2022-01-18 15:36:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:23,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:23,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:23,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:23,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:23,395 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash -240985361, now seen corresponding path program 370 times [2022-01-18 15:36:23,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778173301] [2022-01-18 15:36:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:23,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:23,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:23,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778173301] [2022-01-18 15:36:23,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778173301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:23,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475608943] [2022-01-18 15:36:23,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:36:23,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:23,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:23,534 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) [2022-01-18 15:36:23,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-01-18 15:36:23,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:36:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:36:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:24,003 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 145 treesize of output 125 [2022-01-18 15:36:24,388 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 227 treesize of output 189 [2022-01-18 15:36:24,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 177 [2022-01-18 15:36:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:24,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:24,703 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 199 treesize of output 179 [2022-01-18 15:36:25,113 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:25,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:36:25,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-01-18 15:36:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:25,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475608943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:25,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:25,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-01-18 15:36:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391667034] [2022-01-18 15:36:25,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:25,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:36:25,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:36:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:36:25,217 INFO L87 Difference]: Start difference. First operand 4542 states and 17654 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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) [2022-01-18 15:36:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:28,689 INFO L93 Difference]: Finished difference Result 6607 states and 23799 transitions. [2022-01-18 15:36:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 15:36:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 [2022-01-18 15:36:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:28,705 INFO L225 Difference]: With dead ends: 6607 [2022-01-18 15:36:28,705 INFO L226 Difference]: Without dead ends: 6421 [2022-01-18 15:36:28,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=907, Invalid=8599, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 15:36:28,706 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 310 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 4551 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 4641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:28,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1252 Invalid, 4641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4551 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:36:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2022-01-18 15:36:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4396. [2022-01-18 15:36:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4396 states, 4395 states have (on average 3.885551763367463) internal successors, (17077), 4395 states have internal predecessors, (17077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4396 states to 4396 states and 17077 transitions. [2022-01-18 15:36:28,787 INFO L78 Accepts]: Start accepts. Automaton has 4396 states and 17077 transitions. Word has length 23 [2022-01-18 15:36:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:28,787 INFO L470 AbstractCegarLoop]: Abstraction has 4396 states and 17077 transitions. [2022-01-18 15:36:28,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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) [2022-01-18 15:36:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4396 states and 17077 transitions. [2022-01-18 15:36:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:36:28,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:28,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:28,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:29,007 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,SelfDestructingSolverStorable386 [2022-01-18 15:36:29,007 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:36:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 395631651, now seen corresponding path program 371 times [2022-01-18 15:36:29,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:29,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905805103] [2022-01-18 15:36:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:29,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:29,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905805103] [2022-01-18 15:36:29,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905805103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012225176] [2022-01-18 15:36:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:29,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:29,140 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) [2022-01-18 15:36:29,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-01-18 15:36:29,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:36:29,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:36:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:29,714 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 296 treesize of output 264 [2022-01-18 15:36:30,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:30,334 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 150 [2022-01-18 15:36:30,337 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 137 treesize of output 121 [2022-01-18 15:36:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:36:30,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:31,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 15:36:31,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:36:31,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 248 [2022-01-18 15:36:31,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 194 [2022-01-18 15:36:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:36:32,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012225176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:32,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:32,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 15:36:32,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710574501] [2022-01-18 15:36:32,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:36:32,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:36:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:36:32,042 INFO L87 Difference]: Start difference. First operand 4396 states and 17077 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) Received shutdown request... [2022-01-18 15:36:34,043 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 [2022-01-18 15:36:34,043 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:36:34,056 WARN L244 SmtUtils]: Removed 5 from assertion stack [2022-01-18 15:36:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:36:34,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=487, Invalid=4769, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 15:36:34,057 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:34,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 220 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1511 Invalid, 0 Unknown, 499 Unchecked, 0.5s Time] [2022-01-18 15:36:34,058 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 15:36:34,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:34,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:34,259 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (4396states) and FLOYD_HOARE automaton (currently 61 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 58ms.. [2022-01-18 15:36:34,260 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 15:36:34,260 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 15:36:34,260 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 15:36:34,263 INFO L732 BasicCegarLoop]: Path program histogram: [371, 6, 3, 3, 2, 1, 1, 1] [2022-01-18 15:36:34,287 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:36:34,287 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:36:34,288 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:36:34 BasicIcfg [2022-01-18 15:36:34,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:36:34,289 INFO L158 Benchmark]: Toolchain (without parser) took 923075.00ms. Allocated memory was 350.2MB in the beginning and 1.1GB in the end (delta: 738.2MB). Free memory was 313.0MB in the beginning and 556.3MB in the end (delta: -243.3MB). Peak memory consumption was 498.3MB. Max. memory is 16.0GB. [2022-01-18 15:36:34,289 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 350.2MB. Free memory is still 314.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:36:34,289 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.11ms. Allocated memory is still 350.2MB. Free memory was 313.0MB in the beginning and 311.4MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 15:36:34,289 INFO L158 Benchmark]: Boogie Preprocessor took 13.09ms. Allocated memory is still 350.2MB. Free memory was 311.4MB in the beginning and 310.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:36:34,289 INFO L158 Benchmark]: RCFGBuilder took 421.75ms. Allocated memory is still 350.2MB. Free memory was 310.3MB in the beginning and 293.9MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-18 15:36:34,289 INFO L158 Benchmark]: TraceAbstraction took 922595.90ms. Allocated memory was 350.2MB in the beginning and 1.1GB in the end (delta: 738.2MB). Free memory was 293.4MB in the beginning and 556.3MB in the end (delta: -263.0MB). Peak memory consumption was 477.3MB. Max. memory is 16.0GB. [2022-01-18 15:36:34,289 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 0.09ms. Allocated memory is still 350.2MB. Free memory is still 314.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.11ms. Allocated memory is still 350.2MB. Free memory was 313.0MB in the beginning and 311.4MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.09ms. Allocated memory is still 350.2MB. Free memory was 311.4MB in the beginning and 310.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 421.75ms. Allocated memory is still 350.2MB. Free memory was 310.3MB in the beginning and 293.9MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 922595.90ms. Allocated memory was 350.2MB in the beginning and 1.1GB in the end (delta: 738.2MB). Free memory was 293.4MB in the beginning and 556.3MB in the end (delta: -263.0MB). Peak memory consumption was 477.3MB. Max. memory is 16.0GB. * 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 (4396states) and FLOYD_HOARE automaton (currently 61 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 58ms.. - 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 (4396states) and FLOYD_HOARE automaton (currently 61 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 58ms.. - 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 (4396states) and FLOYD_HOARE automaton (currently 61 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 58ms.. - 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 (4396states) and FLOYD_HOARE automaton (currently 61 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 58ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 922.5s, OverallIterations: 388, TraceHistogramMax: 4, PathProgramHistogramMax: 371, EmptinessCheckTime: 0.8s, AutomataDifference: 349.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67126 SdHoareTripleChecker+Valid, 131.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67126 mSDsluCounter, 146291 SdHoareTripleChecker+Invalid, 110.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 43221 IncrementalHoareTripleChecker+Unchecked, 310788 mSDsCounter, 14586 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 396909 IncrementalHoareTripleChecker+Invalid, 454716 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14586 mSolverCounterUnsat, 11968 mSDtfsCounter, 396909 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28677 GetRequests, 13614 SyntacticMatches, 467 SemanticMatches, 14595 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 223621 ImplicationChecksByTransitivity, 278.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4542occurred in iteration=386, InterpolantAutomatonStates: 10201, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.6s AutomataMinimizationTime, 387 MinimizatonAttempts, 207109 StatesRemovedByMinimization, 382 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 404.0s InterpolantComputationTime, 16753 NumberOfCodeBlocks, 16727 NumberOfCodeBlocksAsserted, 1175 NumberOfCheckSat, 23877 ConstructedInterpolants, 915 QuantifiedInterpolants, 223376 SizeOfPredicates, 4841 NumberOfNonLiveVariables, 38380 ConjunctsInSsa, 7840 ConjunctsInUnsatCore, 1132 InterpolantComputations, 16 PerfectInterpolantSequences, 2059/8281 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